User blog comment:Iamthelegion/Eragon vs Harry Potter/@comment-25036892-20140827021336

Look, I'm going to be honest here, and I'm being constructive and not mean: This is a terrible idea.

There is such a thing as too many characters in a battle, and this is the most extreme example of that I've ever come across. Possibly excluding cameos, no battle should have more characters than can be counted with one's fingers (on both hands, so therefore ~10), and the ideal battle royale generally has about 5 or 6. Trying to put anywhere near this many characters into a single battle results in it coming across as a mess where inclusion becomes meaningless.

If you really have this many characters you're eager to use, do some picking and choosing to create somewhat coherent mashups with as many of them as possible, or at the least make several of these battle royales of randomness with a fraction of the characters each.