they seem intent on sticking with Flash movie because it sets a cornerstone for the DC multiverse concept, which lets them fold in whatever they want in the future but still say its part of DCEU 2.0. We'll probably see Michael Keaton Batman, Joaquin Phoenix Joker, black batman, aquaman, old Wonder Woman, new Wonder Woman, yadda yadda.
Of course everyone who lives in the actual real world knows all the shit storm around Ezra Miller being a huge pedo faggot is going to override any "here is our multiverse!" bullshit, but maybe Ezra Miller can suck a dick so hard you forget actions have consequences.