I think Quantum Break could score the highest, but only if they master the whole split-story telling thing they have going on. It is a game that I think will either bomb, or be incredible.
Sunset Overdrive looked fun, but there is very little known about the game at the moment. Insomniac do have an impressive track record though so they might take the top spot.
Titanfall is also a contender. It is riding on a lot of hype at the moment, but it remains to be seen if it will live up to the expectations of the reviewers, and if those reviewing it will take it as it is or deduct points for the lack of single-player.
Halo games generally score high so there is a very real possibility that Halo will take the top spot, although it would definitely be very nice to see a new IP there!