http://www.oxm.co.uk/68899/microsoft-confirms-halo-5-for-2014/
So, obviously we've known about A Halo game since E3 this past year, but NOW they're confirming it to be Halo 5.
There's plenty reason to doubt the 'awesome sauce' of the game, because 343i did a pretty terribad job with Halo 4 (IMO).
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Probably wont be better than H2, H3, or reach and with out a doubt won't have a better story than ODST. I wanna see gameplay before I go deciding on if I want it or not.