Great answers, all of them! I would really like to see AA take the route of Mego (without the bankruptcy, of course!) and a combination of licenses with non-licensed items.
Licensed items:
Doctor Who (another person on the board posted his survey for a class project. This would be a brilliant license):
Doctor (Christopher Eccleston (sp?) with Rose
Doctor (David Tennant) with Rose variant (?)
Doctor (David Tennant) in tux with Cyberleader
Captain Jack with "Empty Child"
Tom Baker Doctor with K9
Tom Baker Doctor variant with (I don't know, "Revenge style Cybermen?)
Dalek boxed set with a Doctor variant (prob David Tennant, maybe with 3D glasses)
I know I picked a lot of variants, but I know sets with main characters sell the best, and the Doctors and their companions come with a lot of different looks, so they could do this without shortchanging many people. And think of the extra parts for customizers!
(also some chase figures: I am thinking a "glowing eye" Rose and Eccleston Doctor ala "Parting of the Ways", Tennant in PJs, (or jimjans, as I think they are called in the UK)
Flash Gordon!
Other licenses:
How about sport licenses for different teams, etc? I am not a sports fan, but it might be useful in drawing others into buying 'mates (thus earning AA more money, and extending the life of "mates)
Masters of the Universe would be good too.
Someone mentioned Teenage Mutant Ninja Turtles. Not my favorite franchise, but I think a good idea.
Horror and Sci Fi cinema icons (as has been mentioned before!)
And some non-licenses (which would be cheap, and which Mego used to their advantage for some time)
Knights and Dragons (with playsets including castles, catapults, etc)
Police and Firefighters (always a hit with young boys, and maybe with C3 feet could be used with pre-existing building sets built around these themes!)
Military figures (another perennial favorite)
and one I would really like to see:
Classic Monsters: Dracula, Frankenstein's monster (maybe a bonus lab playset with Dr Frankenstein, a variant version of the monster, and a malformed assistant! "It's Alive!")
Witches, werewolves, ghosts, scary pirates, mummies, etc. The list is endless, and generally these figures are public domain so AA wouldn't have to pay a cent in licensing fees (or they can go the license route and tap into the Universal Monsters like Bela Lugosi's Dracula, Boris Karloff's Frankenstein monster, etc)