Oasis are egomaniacs... they would never open for U2. They have their own tour anyway, no? Coldplay wouldn't either, cos yeah, they can sell out on their own.
What I would love:
all the European openers
Muse
Feeder
Cooper Temple Clause
Idlewild
Kent (fat chance!)
Billy Corgan (heh)
Flaming Lips
Garbage again
Manic Street Preachers (ha! again)
I've seen Doves live, but they're so chill. (If you ever get to meet the lead singer Jimi, take it. Such a sweetheart... faked remembering that he'd seen before.) I want to be hyped up before U2, not that they need the help.
Also, for anyone going to Boston 5/24, Snow Patrol are playing the Avalon (I think) on 5/21. And Muse fans, they're doing MTV Campus Invasion at Providence College with Razorlight on 4/17 I think? The energy level of Muse rivals U2's, so I think a smart promoter would not put the two together. Idlewild and Feeder both have new albums coming out, so I think they're likelier openers. In any case, if I don't know the act, I'm sure I'll be pleasantly surprised like I was with the 'Phonics.