Takeover of what?
Warner Bros haven't been able to successfully market any other character other than Batman and Superman in live action movies. Green Lantern, Supergirl, Cat Woman, The Losers, Jonah Hex, Constantine etc all came and went and never evolved into successful continuing franchises. You can't have a successful have a cinematic universe or "takeover" without being able to do that. Dawn of Justice is simply another in the long line of Batman and Superman movies that have been produced. Just that in this case it's one film. It really depends on how the other movies and titular characters are received in their individual franchises/movies with no Batman or Superman in the fold.
Warner Bros haven't been able to successfully market any other character other than Batman and Superman in live action movies. Green Lantern, Supergirl, Cat Woman, The Losers, Jonah Hex, Constantine etc all came and went and never evolved into successful continuing franchises. You can't have a successful have a cinematic universe or "takeover" without being able to do that. Dawn of Justice is simply another in the long line of Batman and Superman movies that have been produced. Just that in this case it's one film. It really depends on how the other movies and titular characters are received in their individual franchises/movies with no Batman or Superman in the fold.