I think a Ferigno Hulk seems perfect for a con exclusive.
Back when we got the Marvel Universe Spiderman and his Amazing Friends TRU set- I thought they should do more three-packs based on the cartoons.
X-men Cartoon - tiger stripe Wolverine, Cyclops with jacket, Jean Grey with pony tail.
Incredible Hulk - Hulk with the brownish red pants, Bruce Banner, She-Hulk with pink tattered dress.
60s Spiderman - Spidey without the webbing, Doc Ock in purple (which we eventually got anyway), "Vulture Man" or J Jonah Jameson (could come with a cape and alternate head to turn him into the show's version of Magneto)