The last time I built up a powerful group, it was wiped out on Level 10 by "Titans." I never even had a chance to fight, and I'm not even sure how they killed off my characters!

Since several of those characters were in their mid-50th power levels, I don't think I'm going back there until I've built up my party to 70+ level.

Has any one else had such an encounter? If so, what happens if you win it?