Originally Posted by
The Kid
Exactly. This goes big for Superman and Batman especially. Their most successful media ever were all in their own universe without crossing over with any other DC properties (Fleischer cartoons, Superman and Batman serials, Donner films, 60s Batman show, Nolan movies, BTAS, etc..)
Hell, considering how divisive BvS and Justice League were, they have clearly been more successful apart than together. Don't get me wrong, not saying you shouldn't have a shared universe with them but someone earlier said it helps them more which I highly disagree with