The jeep falling from the plane, I don't think you can effectively compare new vehicle roster to that of past GTAs, as the Housers explained, basically each GTA must live ultimately as it's own universe, there's no need to actually have a tie in with each issued game in the franchise, too much attention is based on making such comparisons, needlessly, now any obvious similarities are hard to ignore, but personally I like to see what makes GTA favorable return, and improved in all areas
Tennis is surely a game one can play? I would assume there's some minigame possibility, as well, GOLF they said would be more full-fledged then in anytime past!
Poker is not mentioned in returning, but obviously it seems hinted at by the Housers in Game Informer as a non-Half-assed mini-game! A worthy type to include moving forward. Though it's been there, done that, more multiplayer or singleplayer poker in the GTA realm is not a bad idea, in fact, I think it's worthy of inclusion since it's a different time and setting, and certainly more character options just for that!