And then when they let something slip they just go and erase his mind.
Well Doomsday, Zod and Kandor we know and the whole Earth/New Krypton thing we all saw coming, and Lex thing is not going to happen any time soon. So that leaves the Sun-Eater being the actual surprise here for me, that thing is coming back? Awesome.
Also as much as I love the Legion the whole hanging out with people who pretty much know what's going to happen to you and your loved ones and won't tell you is kind of iffy... Then again hanging with someone whose entire life and fate you know about and can't tell him must be pretty strange too.