It's definately possible, as I had AoE for my Windows Mobile PDA 3 or 4 years ago, and given the touch controls and quadruple resolution of the iPad/iphone4 I think it would be excellent! Then again Microsoft owns Ensemble Studios (right?) so I don know how they feel about an iPhone port.
Opinion. However, a game of this caliber is clearly possible as long as someone is willing to develop it. Porting of AoE2 sounds very doubtful however.
LASW: Best Realistic RTS Red Conquest: Best Futuristic RTS It just depends on what you want and like in a RTS. Personally Red Conquest is my fav. I was just supporting Teh Ninja
red conquest is the only rts on the idevice that stays true to what I've always thought to be the core element of a rts: complete capability of micromanaging your army with amazing, precise controls.