Damn, this thread is an embarrassment... Sure the topic at hand is prone to go sideway -especially when it is presented like that- but I don't think I have read one single thoughtful answer on a topic that is indeed interesting - what could be brewing hidden inside Microsoft Studios and their partner
Most obvious, we have games that have already been announced that will get a 2017 release date. It is not something unheard of to unveil games two years before they are release, especially for Microsoft actually. Many 2016 titles are a prove of that - Scalebound and Crackdown 3 were unveiled at E3 2014 (along side Phantom Dust if memory serves right), and are scheduled for 2016, Quantum Break was announced at the same time as the console in May 2013... In the same fashion, Xbox One big 2015 title (aka Halo 5) was first announced back in 2013 . Sure when a new generation begin, you tend to present project a bit earlier than usual, but still... chances are some of the already announced title will end up with a 2017 release date. Good candidates for that would include Sea of Thieves, Crackdown, or even Scalebound if we are unlucky.
On the other side, we know they have internal teams, that are bound to have project. Based on their release calendar, it's fairly easy to estimate when their next title will be :
- Halo is on a yearly release, so we most likely will get some kind of Halo from 343 and an external partner like usual
- Turn 10 is a machine, we will get a Forza Motorsport 7 in 2017, this is a given.
- We know Lionhead has been working on a non-Fable game since 2014, so a 2017 release date is completely possible
- We know Undead Labs has been working Xbox One MMO zombie game for quite a while now, so that's another candidate
And last but not least, I am pretty sure Microsoft has some surprises for us, partnering with external teams.