God Part II
The Fly
Why do you think it would be unrealistic ? if it's from a McGuine$$$$ "why give it away we can charge $20 for it later" perspective, maybe. But technically it's not difficult at all, and since they seem to be exhuming the archives I think it would be reasonable to expect something.
Because, when you look at the popularity of a JOSHUA TREE or an ACHTUNG BABY versus their first three albums, there simply wouldn't be a profitable payoff for that level of extra material production. I'm not saying it's all about the dollars, but by the same token, I'm sure U2 don't want to go into the red trying to please their hardcore fans.