You clearly havnt played the Beta. It's by far the best Halo combat in the series. 

Id expect the game to sell 3-4 million and probably sit on a 5-6 life time sales.

I'm thinking around 750K. the hype has died down quite a bit since the last version

If Halo 3 sold 12m on the 360, I predict Halo 5 will sell 7 million lifetime

750k sales? Wow, that's a steep decline.

So the XBONE isn't going to sell a single additional unit moving forward restricting Halo 5? No offense but I swear that nobody bothers to learn anything about sales on this forum (which would be fine if not for the very nature of this site). By your logic it was impossible for Gran Turismo 3 to sell 15 million units on such a tiny userbase at launch. The thing is though, the PS2 kept selling after GT3 was released. It's funny how that works isn't it?

Around 2mil FW, 6mil lifetime.

But definitely won't outsell Uncharted 4 in their first 3 months respectively *refer to super6646 bed =P

probably less than 6 million

Yeah but the xbox probably will sell 30 million max, for 10 million halos 30% should have bought it.

When the XBOne doesn't sell anywhere else in the world, and the only way it stay competitive even on its home turf if by heavy discounts and bundling games for free (i.e. a practice that is not sustainable), that puts a hard ceiling on XBOne's total sales. Yea, it'll continue to sale in the coming years, but not a lot. And people aren't gonna be buying Halo 5, new, this time next year. Your GT3 example is flawed because the PS2 actually blew up in sales. Same can't be said for XBOne

FW: 3.2 Million
LT: 9.5 Million.

Will be interesting to see if Uncharted 4 will sell better than Halo 5.