Okay I am A strict believer that there will either
A) Be Another Gears of War
B) Be a Dlc titled 'A future' (or something) where the future isn't as good as she said in the final lines of the game
C) Both A and B will come true! Because you can not just turn a whole world that has been ripped and violated into something better!
I don't think it will be the last one,maybe I'm wrong, but I hope they further the lore of gears of war somehow (Movie? Lmfao)