Any hints or countdowns as to when we will get an actual reveal?
No. There's a rumour that it might get a reveal at some kind of Google Stadia event on Thursday, but to my knowledge that event itself hasn't been announced. We know that Stadia is having some kind of summer event at some point to make announcements but don't have anything confirmed beyond that (i.e. not a BG3 connection).
E3 would be the logical place to show it if the above doesn't pan out. PC Gaming event, in particular.