I saw an intriguing question posted elsewhere, but I'm curious. If you had a bajillion dollars, what 5 game sequels would you develop?
For me, it would be:
Clive Bakers Undying - such a well made game that genuinely scared the holy crap out of me at points.
Bruce Lee - the Commodore 64 classic. It would be an awesome co-op platformer game.
Exploding Fist - I'd go the Street Fighter II route with it or a Double Dragon / Final Fight beat-em up in 3D.
Wolfenstein: Enemy Territory - I think there's a Wolfenstein sequel underway anyway, but an update of the multiplayer game would be awesome. I'd like it in the Call of Duty vein though, rather than the aircrafts/vehicles/larger areas/displacables/shoot at dots that Quake Wars was. Just nitty gritty close quartered team orientated combat on memorable maps like Fuel Dump etc.
and finally, Elite: Frontier - David Braben has been taking his sweet ass time with a sequel, and technology has had a massive leap since Elite: Frontier was released over a decade and a half ago. I don't wanna play an MMO like Eve :[