Here is random awesome Kong art from ArtStation, credit to the artists.
Here is more kaiju artwork by Dope Pope as well as a collaboration with fellow artist Digiwip (bottom two pics), check out their pages here and here.
We have featured his artwork before but this Biollante may have just blown away everything, truly amazing. Check out his page here.
Check out his DeviantArt page here.
Check out his ArtStation page here.
Check out her page here.
We have featured Dopepope's art work before here is his version of Bagan, work in progress pics, as well as a very cool interactive 3D rendering via Sketchfab (below). Check out his page here for all his artwork.