Power Struggle was AWESOME. I remember it was the only reason why I kept playing Crysis and Crysis Wars... Will it be back?

No problem with that except it would need entirely new maps, allowing 12on12 to 16on16 battles (8on8 if we cut out the vehicles) as the current ones are obviously too small.
But personally, it wasn't my favorite mode as it took partly AGES to get things going. Perfered TIA as that was going on a lot faster, usually.

its a lot of work to make that game mode , so sadly it wont happen, plus most people prefer this lame deathmatch type game mode because its faster

Yes, I agree that it will require a lot of work, but look how many people like playing it! It was like the most popular game mode in Crysis! More than half of the servers ran Power Struggle. So, if you, CryTek, manage to make Power Struggle happen in Crysis 2, I'm sure that a lot more people will actually BUY the game instead of pirating it!