If you look at every member, each one of em (exept frank that i know of) is a song writer in there own right, and i'm sure they have all written and demo'd songs they hope will be on the next record.
This is nothing new, i have heard or read in the past somewhere (forget where i'll try find it) that one of the reasons uyi 1 & 2 were a double record is that each member of the band bought in there own songs and axl felt he needed to let these members shine on these songs to stroke there ego's a little so that the band might continue, i get the feeling that this has never fully been the (axl rose show) it has been portrayed as in the media, and considering this i think that either of a few things will happen/
1, The welth of backed up material will be added too by a few new songs and released as a double album in 1 to 2 years.. or
2, A new album will be written by the current line up, resulting in a long period of time without playing live,and the album would come out in 3 or 4 years but with all new material
3, I'm a verry drunk man right now
4, Macaroni predicament cover album is unleashed on the world, DJ comes out as gay...bumblefoot come's out as the second coming of christ and they have a light sabre style fight using dizzy's and pitmans keyboards as light sabre's ....(richard cries in corner)
5, Im drunk