[quote=@TheUnknowable]
What's the status of the Fortress of Solitude and the Watchtower, and where are they.  Those would be the logical places for us to start looking for Superman.
[/quote]

Superman still has the crystal fortress but nobody's ever been there. As for the Watchtower, the only Justice League has been the Trinity up to this point [Superman, Bats, and WW] and they operate out of the Justice Tower in Metropolis when they're together. 

WW is in Europe though, and Superman is off world. Until Batman gets there, the Justice Tower is locked up tighter than Fort Knox.

~KL~