It's true though, you can see them building up to it with the DCEU already, and (especially with WW's success) the comics always ape the movies because of the difference in scale between audiences. And between the DCAU and the DCEU, WonderBats will become truly cemented in the eyes of popular culture. Wonder Woman having a thing for Batman in the old Justice League cartoon s already one of the things a lot of none-comic readers recall from their youths.
Which came first, by the way? JLU, or their brief 'thing' in JLA back when Rayner was GL?