I'd love to get the G1 combiner teams. that do combine. Failing that, I'd love to get Bruticus, Defensor, Abominus, et al as Ultra class figures that don't seperate into the individual figures but still transform into something consistent with the original team.

I'd also love for the baseformers to be reimagined.

Failing both of those ideas, how about:

Sixshot
Go-shuta
Minerva
Soundwave
More Dinobots
Twintwist
Topspin
Broadside
Catilla
Longtooth
Octopunch
Gutcruncher
Skyhammer
Grandus
Wideload