Um... yes there is lots of doubt that there will be planes. Like the VP of Rockstar specifically saying that there won't be... kind of a clue, y'know?
People who say there will be hidden planes or that Rockstar are just joking/lying are really not facing up to the fact that there won't be planes in the game. Get over it.
If it turns out that there is a plane, then that's an added bonus, but there is nothing to say that there will be.
Too true, I think a variety of helicopters though will make up for there being no planes.
It would be nice if there were some unlockable stuff thought, not planes but like unlockable motorbikes and cars.