Stop dreaming there will be no early release
B-but....
In all seriousness - theoretically possible (and if so, then not some months in advance) but highly unlikely.
I assume you can always polish (no pun intended) and add more so why not utilize the given release window to the full extend and make sure nothing is (overly) buggy by the time of current planned release? Some issues will crop up anyway. Not that I'm an expert on sales windows and game development but the game carries high expectations.
If I have the simplified choice between releasing early but with potential issues and releasing as intended while utilizing the time for fixes and polish, I'd pick the second option because you risk company damage and bad press if some major issues arise. I'd rather go by the date we now know and hope it's indeed ready as intended until then, without additional delays required.