I would. I don't think it was a "reaction" to anything other than the money made by Man of Steel letting them know they can start adding Batman to things.
They'd been pursuing Justice League movies for YEARS before Marvel put together their cinematic plan (a plan that Jon Favreau recently admitted was inspired mostly by... the Fantastic Four movies).
How they're making the movies is dissimilar to how Marvel does it, and their plan for introducing superheroes into their shared universe is different as well.
The fans are way more invested in the concept of a corporate pissing match with these superheroes than the executives themselves are.