Would be a great way of treating the fans..
If I ever got access to the U2 vaults the first things I'd go for:
"Bulldozer.." -- the song that Larry told an interviewer (Rolling Stone by my memory) was the best ATYCLB track (I suspect it became "Elevation," but who knows?)...
The "completed" Chris Thomas HTDAAB that Larry nixed.
The Rick Rubin sessions (and while we're at it, everything that was recorded between 2005-2008)
SOA as it existed when NLOTH was released.
POP outtakes (particularly earlier versions of the final songs) 1996 Hong Kong Mixes!
The early-to-mid 2008 "completed" NLOTH that proved the basis for Linear.
The Dangermouse SOI - entitled '10 reasons to exist', remember SLABT was the only track left completely untouched on SOI, there was a fully completed album ready to go as of June 2013, and with SLABT the only track to make SOI in it's original form.. that means there are still 9 completely different unheard U2 tracks produced by danger mouse out there.