C´mon Sega, you have more than only the Alien franchise. Please announce a new Predator only game. Something like Concrete Jungle.
The Pred angle was worked in by Fox for AvP as it would have cost them to sever the existing contract and renegotiate. The others rightly only extend to the Aliens license, and this isn't going to be Extinction 2 and that's awesome because that game was a giant pile of ass smeared in dead babies.
CA has never done an open world game and has very little logistical strength in the department, unless they intend to staff the new studio thusly.
It's rather likely to be tactical oriented 3p with unit "construction" and hubbed areas to open and return to with different abilities and troop types/vehicles, same for Aliens if it's adversarial.