NCsoft Europe today announced that a titanic clash between supergroups will take place tonight, April 28th, within the European Training Room test server. This is one of the promotions to highlight the upcoming free content update for City of Heroes, Issue #4: Colosseum, due to go live on City of Heroes' European servers this May. Check the infosheet for details if you'd really like to be one of the 75 heroes to form their supergroups. We have a few more screenshots for you to look at, so be sure you don't miss them.