Batman vs. Superman

There has been speculation about a Batman/Superman movie.
I hope that they make it. Hehehehe.

But!
It could well be a Batman VERSUS Superman movie.

Noooooo. That can't be done!!!!

Reference from the comics and cartoons and movies!
They can't fight each other!!!
They must save the world from....something.
From a threat.

If Batman fought Superman....he'll win! Poor Superman.