Mirage will probably be another reskin with a needlessly big world and the same old mechanics. Once you've played one, you've played them all pretty much. It's one of just a few successful IP's Ubisoft have left so they will milk these games forever and they all have the same design philosophy and template which I don't like. If they cut down the game worlds by 60%, removed 100+ filler quests along with the level gating and made it more of a crafted experience then they could probably be onto something like The Witcher 3. Sadly this framework is just so safe, uninspired and mentally exhausting to play that I'll probably never buy another AC again.
Wouldn't even force myself to play Valhalla for free.