As long as they use the,"World's Finest" animated movie as a general template, this movie could potentially be an incredible success.
There are many who don't understand the incredible drama and strong themes that can and have been explored with these two characters together.
I have to laugh at the naive internet trolls that assume right away this will be a "V.S" movie and that the two characters don't belong together.
What those people don't realize is that the true drama and story lies in the Ying and yang principal of Superman and Batman.
Their story was perfectly told in "World's Finest" and that feature stands as proof how well these two iconic characters can be used in a joint feature.
If you read articles around the web you will see why folks think its a VS. Snyder said "Let's face it, it's beyond mythological to have Superman and our new Batman facing off, since they are the greatest superheroes in the world"
Superman Will Fight Batman in 'Man of Steel' Sequel | Movies News | Rolling Stone