If GoW 4 is still in greece and has Kratos, it won't reach 80. If they bring a a different protagonist and mythology, than it will make it to 90+.
I can see Uncharted doing under 90, but i don't think i would bet on that. I can see Halo between 83~87 actually, i give you this.
Can talk about GT, Forza or Gears.