Siege or Kingdom Mirage in Diaclone red deco.
I thought they were going for that since they gave the Siege one an alternate toy accurate head mould, but so far we've only seen that in clear blue.

Also, give me the VW Bee in light blue like the Micro Change toy (no, not Glyph).

Lesser priority:
Sureshot
Springer in proper cartoon/movie colours without battle damage