With Forza Horizon being my favourite racing game series at the moment i'm basically waiting for the fourth one. Only a whole new F-Zero or Wave Race might be better (for me).
Halo 6, well, i'm waiting for it and hoping the campaign gets better. And honestly, there's nothing wrong with sequels. I'd love a new Sunset Overdrive like many others did.
But MS needs new IP's as well. They don't need new stuff instead of the older IP's, they simply need both. And it mus be more and better with Sea of Thieves and State of Decay 2 being more or less underwhelming.
It doesn't need to be big every time though. I really enjoyed ReCore, even though it was very far from perfect. Other smaller to mid budget games, but please more polished than ReCore, would be great.