Oooh, and it could also include gross-CGI smirking face as an alternate head!

Megaguirus doesn't top any list of mine for future MonsterArts releases, but yeah, she'd absolutely benefit from a great articulated abdomen. Including a robust stand would be a must though.
As for the GMK hint, alright, sure. All the better if it means all three titular monsters, but it's Baragon that would be the absolute must-have of the lot.