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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Destiny is a new IP so it won't be judged like the sequels to Halo games. Also, if you think Halo 2 and 3 didn't get as much hate as Reach and 4 then you are delusional.