MMO might be a possiblity. They have the cash from the licensing fees for UE3 and the >$1 billion the gears of war franchise has raised.
They were interested in buying APB back in late 2010 - so they have some interest in MMOs.
It would virtually get rid of any piracy factor.
If they did it F2P and micro-transactions it would let them knock out a low budget quick one which could test the scalability of UE4 and if it was a sucess they could keep adding to it.
MMO makes sense to me