many assumed they were other monsters in the film or other forms of Godzilla. We now know they are other forms, above and below are those figures both from Bandai. We believe the one below is "A" and above is "B", A is 95mm tall and 310 mm long, and B is 130mm tall and 330mm long (6 inch scale). Both will retail for approx $17 US and should be released sometime this month.
Update: these are now being referred to as 2nd and 3rd forms instead of A and B.