rom is the only one with a neutralizer. that could do supes a LOT of hurt IF IT HITS. can't really see how that would happen though.
terrax plowed easily through a bunch of the knights, but eventually through teamwork they defeated him.
supes>terrax and WAY faster. there are a lot of knights though. still, rom is the only 'real' threat. i'd say kal could do it if he can avoid getting neutralized.