Kadokawa has announced the Gamera 55th Anniversary Project, to celebrate Gamera's 55th Anniversary, there are multiple things that are planned with probably more to come. Two announcements tie into each other, the release of 4K Blu-rays of the Heisei Gamera trilogy, as well as the showing of 1995's Gamera: Guardian Of The Universe in a limited cinema release.

The Heisei trilogy features each film in a two disc set including the 4K HDR and standard Blu-ray versions, these sets feature a 20 page booklet, the 4K are mastered from the original 35mm negatives while the standard Blu-rays are the same as the ones released in the 2016 box set, they will each feature commentary from many involved in each film, and more. Release date for these sets is Jan 29, 2021, and they will retail for 7,800 yen (depending on retailer).

The limited theater showing of Gamera: Guardian Of The Universe will happen on Nov. 27, 2020, the 55th Anniversary of the release of the first Gamera film in 1965, it will be shown at 7 different cinemas around Japan in 4K (Marunouchi Piccadilly, T Joy Yokohama, Umeda Burg 7, MOVIX Kyoto, Midland Square Cinema, T Joy Hakata, and MOVIX Saitama).

Also there will be a Gamera Tokusatsu DNA event from Nov 27 to Dec 26, at the DUB GALLERY AKIHABARA, that will feature many Gamera releated items as well as continue the 55th Anniversary celebration.

​There will be more as well with collectibles (HG figures) and other items (Showa DVD set), more as we get it.

Links to purchase the three sets on Amazon Japan - 
https://www.amazon.co.jp/exec/obidos/ASIN/B08LRHN1RV/natalieeiga-22
https://www.amazon.co.jp/exec/obidos/ASIN/B08LRFBYLX/natalieeiga-22
https://www.amazon.co.jp/exec/obidos/ASIN/B08LRH7743/natalieeiga-22

Arrow has announced the standard box sets for the Gamera films, there is three set coming, Heisei in regular Blu-ray set and a Steelbook set version, and a regular Showa Blu-ray set, Gamera The Brave is in the Heisei regular Blu-ray set (not in the Steelbook set). There appears to be no difference in the disc content just the set extras are not including from the original release. The Heisei Steelbook set will retail for $46.99, regular set for $64.99, and the Showa set is also $64.99 (not sure why the Steelbook is less), release date is Jan 26th, 2021. 

HEISEI SET
SPECIAL EDITION CONTENTS

• High Definition (1080p) transfers of all four films on Blu-ray, including 4K restorations of the Heisei Trilogy by Kadokawa Pictures
• Original Japanese and dubbed English DTS-HD MA 5.1 and 2.0 audio for all films
• Optional English subtitles for all films
• Reversible sleeves featuring original and newly commissioned artwork by Matt Frank (regular sets only)

DISC ONE – GAMERA THE GUARDIAN OF THE UNIVERSE

• Commentary by Matt Frank
• Newly filmed introduction by August Ragone
• A Testimony of 15 Years: Part 1, the first in an epic three-part documentary interviewing cast and crew of the Heisei Trilogy
• Interviews with director Shusuke Kaneko and SFX director Shinji Higuchi, filmed by Jörg Buttgereit in 2002
• Extended interview with Shinji Higuchi, focusing on the trilogy’s special effects
• Behind the scenes featurettes tracing the film’s production from announcement to release
• Alternate English credits
• Trailer and image galleries

DISC TWO – GAMERA 2: ATTACK OF LEGION

• Commentary by Kyle Yount
• Newly filmed introduction by August Ragone
• A Testimony of 15 Years: Part 2, the next part of the documentary interviewing cast and crew of the Heisei Trilogy
• On-set footage from the shooting of the film’s main unit and special effects filming
• Behind the scenes featurettes tracing the film’s production from announcement to release
• Alternate English credits
• “Lake Texarkana” comedic dub track
• Trailer and image galleries

DISC THREE – GAMERA 3: REVENGE OF IRIS

• Commentary by Steve Ryfle & Ed Godziszewski
• Newly filmed introduction by August Ragone
• A Testimony of 15 Years: Part 3, the final part of the documentary interviewing cast and crew of the Heisei Trilogy
• Behind the scenes featurettes tracing the film’s production from announcement to release
• Deleted Scenes
• The Awakening of Irys (Remix), a montage of behind-the-scenes footage and work-in-progress special effects footage
• Alternate English credits
• Trailer and image galleries

DISC FOUR – GAMERA THE BRAVE

• Commentary by Keith Aiken & Bob Johnson
• How to Make a Gamera Movie, a featurette hosted by director Ryuta Tasaki
• Behind The Scenes of Gamera the Brave, an all-access on-set documentary
• The Men That Made Gamera, a documentary looking back at the series from start to finish, featuring interviews with cast and crew
• Opening Day Premiere, a featurette showing the cast and crew presenting the film at its first showing
• Kaho’s Summer, an interview with the film’s young star
• Special Effects Supercut, a montage of effects shots overseen by FX supervisor Hajime Matsumoto
• Trailer and image galleries
• Note: not in Steelbook set

SHOWA SET
SPECIAL EDITION CONTENTS

• High Definition (1080p) transfers of all eight Showa-era Gamera films on Blu-ray
• Lossless original Japanese and dubbed English mono audio for all films
• Optional English subtitles for all films
• Reversible sleeves featuring original and newly commissioned artwork by Matt Frank

DISC ONE – GAMERA THE GIANT MONSTER

• Commentary and newly filmed introduction by August Ragone
• High Definition (1080p) transfer of Gammera the Invincible, the American theatrical version of the film, with lossless mono audio and optional English subtitles for the deaf and hard-of hearing
• Remembering the Gamera Series, an archive featurette from 1991, including interviews with director Noriaki Yuasa, writer Nisan Takahashi and others
• Interview with Noriaki Yuasa, filmed by Jörg Buttgereit in 2002
• Gamera Special, an hour-long best-of compilation supervised by Noriaki Yuasa in 1991
• Alternate English credits
• Trailer and image galleries

DISC TWO – GAMERA VS. BARUGON / GAMERA VS. GYAOS

• Commentary on Gamera vs. Barugon by August Ragone & Jason Varney
• Commentary on Gamera vs. Gyaos by Stuart Galbraith IV
• Newly filmed introductions to both films by August Ragone
• High Definition (1080p) transfer of War of the Monsters, the shorter American edit of Gamera vs. Barugon, with lossless English audio
• Alternate English credits for both films
• Trailer and image galleries

DISC THREE – GAMERA VS. VIRAS / GAMERA VS. GUIRON

• Choice of three different versions of Gamera vs. Viras via seamless branching
• Commentary on Gamera vs. Viras by Carl Craig and Jim Cirronella
• Commentary on Gamera vs. Guiron by David Kalat
• Newly filmed introductions to both films by August Ragone
• New featurette with actor Carl Craig showing his souvenirs and props from Gamera vs. Viras
• Highlights from the G-FEST X convention in 2003, featuring Noriaki Yuasa and Carl Craig
• The 4th Nippon Jamboree, a promotional film for the Boy Scouts of Japan directed by Yuasa in 1966
• Alternate English credits for both films
• Trailer and image galleries

DISC FOUR – GAMERA VS. JIGER / GAMERA VS. ZIGRA / GAMERA SUPER MONSTER

• Commentary on Gamera vs. Jiger by Edward L. Holland
• Commentary by Gamera vs. Zigra by Sean Rhoads & Brooke McCorkle
• Commentary on Gamera Super Monster by Richard Pusateri
• Newly filmed introductions to all three films by August Ragone
• Alternate English credits for all three films
• Trailer and image galleries