I would hope 2020/2021, they seem to be building everything towards a brand refresh for next gen. They need to really, Halo Infinite as a launch title would be confirmation that they realise this. There is a lot of potential with Xbox right now, I hope they can capitalise on it. But to the question of your thread... who knows if they will be able to, over the next year or two we should be able to get a good idea of their plans. As rumours/reports come out, as GDC and E3 2019 passes. What moves they make on the first party front, they have said their not done so lets see who they partner with/acquire. What the mysterious MSGP is working on etc, exciting times but who knows if it will be the successful relaunch the brand needs or a staggered whimper.