Or argue with each other over which character they think would win. I watch
Death Battle (which tries to be objective over who wins) and
One Minute Melee (which takes the opposite approach and has whoever the animator wants to win take the victory), and based on the comment sections of those shows, if anyone with too much time on their hands and even the slightest bit of familiarity with one of the franchises takes issue with who wins the poll...
It's not gonna be pretty.