Do I feel a de ja vu moment.... All the speculation is what happened with the last album. We had rumours of multiple albums in the works of a second release during a tour, which even seemed real given the play of new songs on the tour. Yet, here we are a few years later, and nothing has happened. If U2 didn't like it a few years ago, I don't hold much confidence that they'll release it now.
All these locked away tracks probably won't see the light of day until the band is done and they need to go through the next big anniversary box set phase to pad their pockets.
I may be cynical, but I'll be happy with one album of any kind, and I'm really just hoping the Danger Mouse stuff sees the light of day unlike the Rubin stuff of the past that is still tucked away somewhere.