Seriously all this hype will turn into "OMG Bungie sucks" or people like Spartain ken will be kissing Bungie's backside.
I enjoyed Halo Reach and Halo 4 because I had no high expectations, I looked forward to those games and was rewarded with a fun experience. Everybody who says they hate Reach and Halo 4 say they got hyped and then let down.
So lets have a guess for how long it will take after Destinies release for people to start hating, im going to say Day 1.
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I give it a week. I'm sure the game will be excellent, but many people are banking on it playing very similarly to the older Halo games, and many others have just let themselves get too hyped up.