Or maybe we should try and get more activity first...
Some of the battles had little to no participation.

It will be very disappointing to see how much work the Zelaron Melee mods have put in, and yet it recieved no attention from us. For instance...Simon vs. Sigma.

EDIT:
Anyway, I think it is easier if the Team members are all from the same game. Why? Some people are not too familiar with all the games. Say, a team that consists of Diablo (From Diablo series), Ayame (From Tenchu) and Mario (From...Mario). It will be hard for someone to know all three characters, considering that we all play different games, some prefer different genres, etc, and it will affect the activity of the battles, overall.

People might just look at the team and think, "I know nothing about that character in that team so I'm not going to participate."

If the characters are from the same game however, it will be easier. Just because it is from the same game series, doesn't mean the teams have to consist of characters from the same side (in the game).