It's not even out yet. I suppose you're asking if we're expecting it to be, and actually I don't know. I have owned the first two, and I played the Beta. I just fear there won't be enough new content and whatnot to really make it stand out, so while it'll be good, it won't top the first one in all reality in that it may not revolutionize or innovate at all.
The story will most likely be strong, but once you go through once or twice all you have is the multiplayer, which would normally be my favorite part, but there are so many good online shooters now that I might not favor it anymore. I'm hoping it will do something really great, or if nothing else really perfect the fundementals, only time will tell. The Beta was really pretty the same old game.