WMG / The Guyver

Mark Hamil's character was meant to be the Guyver.

The poster with Mark Hamil and the Guyver as the same person was the original idea, but because of the extensive Executive Meddling this was changed for younger audiences, like most of the out of place humor. Because of this, it's also possible that the character Sean Baker was the one meant to be turned into a Zoanoid instead of being the Guyver, or was never a part of the original script at all.