Unfortunately I can't see another GnR album seems like this was a touring only reunion whether it lasts beyond this year is debatable,Axl and Slash are polar opposites about what constitutes GnR,Axl wants the big epic OTT grandiose sound with full orchestra a cross between Elton John and Queen ,Slash on the other hand wants straight forward Rock, big guitars sounds similar to Zeppelin and Aerosmith well that ultimately led to the split in the first place whether the two will compromise is another question ,Slash said when Izzy left he found it hard to deal with Axl in the studio as Izzy acted as a mediator between the two.As for Axl going back to Acdc that may never happen as the last tour was just fulfilling a contractual agreement that they couldn't get out of ,with their bassist Cliff Williams the latest one to leave their future as a band doesn't look too promising.
I think those musical differences have very much softened, and were overblown to begin with. Chinese Democracy had rockers like IRS and Slash has done orchestral stuff (Gotten has a bunch of violins, a cello and an organ on it).
Also, Angus has made it pretty clear he isn't done yet. Whether he continues as AC/DC or not, who knows, but the man still enjoys playing and writing, and he very clearly loved Axl's performance with them.
