There was a twitter post that pretty much said West Batman will be around stores in late september which means Keaton is probably mid/late october.
I'm pretty sure this Batman is gonna sell fast and they're going to end up releasing a battle damaged one too, kinda like how Iron Man ended up with a Tony Stark head + body damaged. I doubt they would put a Keaton face on it since he pretty much wore the suit with the mask on the entire time in 1989.
They could also just end up releasing a Batman Returns version. I think the cowl is the same (maybe I'm wrong its been awhile) so they could just use the same mold. The body shouldn't be that hard to change since its a pretty simple design. I think the belt and downwards is also the same as the 1989 suit.