Infinity Ward's Robert Bowling has done the unthinkable and has actually used the word 'never' when speaking a future development of a video game.
"We never put vehicles in multiplayer", were the very words he used regarding Infinity's Ward's Call of Duty-based product in future.
Good on you Robert, at last someone prepared to actually make a statement.
He also said this though, "...where you previously could call in UAV, Airstrikes, and Helicopter Support but had no control on how helpful they were, there are many more options which allow you to take control of the gunner or control its success a bit more for a limited time. Such as the AC130 gunship where you can fire any of the three weapons on it during its limited time in the air."
Source: Gamerzines