The movie Flash (Ezra Miller) appeared in a cameo in the current Flash TV show during Crisis, and Michael Keaton's Batman is now part of the movie Flash's universe.
I'm not sure what is going on with that...
During Crisis, many past TV Show & Movie versions of our DC Characters over the last century were featured or referenced as having existed in Parallel Universes...
I thought that was really cool...
But, the Multiverse was destroyed, and was rebuilt with only a few of those universes still existing...
ALL of the CW shows, some of which took place in a few different universes were merged into what is now being called the CW-Verse. The Arrow-Verse as it was once called, no longer exists.
Think of it as each of the main cities with it's main characters from each show, being carved out, and placed into the CW-Verse.
Yeah, it's a bit confusing, and weird.
But, as I recall...
No alternate universe was depicted for "The movie Flash (Ezra Miller)", he just appeared in a speed force encounter with "the current Flash TV show" Flash... and had a cool moment where they shared ideas about being "The Flash" with each other... before they left the speed force.
I don't know if his universe was destroyed, or if it was recreated, or... If he came from some other Multiverse? Who know about that? This multiverse idea is complicated, and the writers can come up with even more crazy ideas, to suit their needs...
There was SO much going on in that crossover, that I can't remember if Michael Keaton's Batman was featured in it or not...
I think it is best, just to accept that things have changed... Cannon and Continuity, as we knew them, throughout the old multiverse (past TV Show & Movie versions) no longer exists, since Crisis... and Just accept the NEW, and what it is supposed to be now.
As far as I know...
The last that I heard, Superman & Lois were supposed to take place in the CW-Verse...
But I have yet to watch that show or follow anything that is supposed to be going on with it, since it was first announced...
So things may have changed.
You probably know more about it than I do...
But like I said, the old Multiverse, no longer exists...
So take that into account, when trying to understand what is going on now.
Crisis was cool for the TV Shows, but it has created a mess for the casual followers.
So, I don't think the Movies, are going to reference the CW-Verse, in any way, since many Movie fans, haven't been following the TV Shows...
Doing so, would just make watching the films too complicated....
The continuity and cannon that we saw up through Justice League, will probably still be used as the basis for future films...
However, with the different Director cuts, and with the possibility of studios wanting Reboots... That could change things too...