One thing is for sure, this year will not have the great contenders like 2017, with Zelda, Horizon and Mario. So far only God of War is a real contender (be serious, a strongly japanese game like MonHun will not get much awards from western reviewers). RDR2, AC Odyssey (this should release this year, right) and Smash will probably contenders. Neither looks like it will reach the quality of the 2017 games.