Analogy time.
James Cameron is my favorite film director, and Terminator 1 and 2 are among my favorite films. I've never seen the subsequent two movies in the series. The reason being, nothing I saw or read about them made me want to see them. The reason I love T1 and T2 because of the way they were made, not the title. I'm a Cameron fan, not a Terminator fan. So I approach his next endeavor with frothing desire, not the next Terminator film.
So to with Bungie. Halo made me a Bungie fan, not a Halo fan. So I'm in line day 0 for whatever Bungie is cooking up, and I approach the next Halo with cautious optimism; it's from a new team that's never done a game together before. If it looks good, I'll get it. If not, I'll move on.
(Believe it or not, I'm not currently sold on CEA. The strength of the Firefight map and the depth of the TU changes and how they affect the classic maps will seal it for me; otherwise, I'll be blissfully playing Skyrim.)