Some old idea that I forgot about: Creating a character for each of the ten teams.
I have an idea of combining the team color with some strong black silhouettes, perhaps woodcut style. So the graphic will not aim for realism, but will be a bit closer to icons or pictograms.
Sketch here:
http://imageshack.com/a/img849/3610/ipro.jpgAlso, I show the teams weak and strong points visually using a point
system with 1 to 5 stars. I think this gives a better overview than the text
description.
I should try and make the the character design reflect the nature of the team. So if magenta is fast, its character should look fast too.
Perhaps underwater theme: Mermaids, fish, shellfish, snails, jellyfish, boats, divers, octopus, deep sea creatures.