The band is yet to make any official announcement regarding the lineup of musicians who will take the stage tonight beyond singer Axl Rose, guitarist Slash and bassist Duff McKagan.
But photos from the venues have revealed that keyboardist Dizzy Reed, guitarist Richard Fortus and drummer Frank Ferrer are all involved.
When a fan asked Sorum on Twitter if he is going to perform with GN'R in their next concert, Sorum answered simply: "Nope"
Recently it was reported that Ferrer, who has been in the GUNS lineup since 2006, will play the bulk of the show at the upcoming concert of the band, although "Appetite For Destruction"-era drummer Steven Adler could appear as a special guest.
Sorum had replaced Steven Adler in GUNS N' ROSES and has recorded the highly successful albums "Use Your Illusion I" and "Use Your Illusion II" (both 1991) and "The Spaghetti Incident" (1994). He also supported the group on the "Use Your Illusion" tour and can be heard on GUNS N' ROSES' "Live Era: '87-'93" (1999) and "Greatest Hits" (2004).
Last year, Adler spoke about a hypothetical reunion of the classic GN'R lineup which would include Matt Sorum on drums instead of him. "Matt wouldn't do it," Adler said .
"I see Matt practically every Monday night, and we talked about it. He wouldn't do it unless I was a part of it. And I said, 'Well, dude, I would do it without you.' And he said, 'But you're the original guy. You're the sound of GN'R. I'm not. So it's different.' And I said, 'If I did it, if Axl wanted to play the '[Use Your] Illusion' songs, I would have you right next to me. You come up and I'll either take the throne or sit where I sit. Sort of like [the way we did it] at the Rock And Roll Hall Of Fame [induction in 2012]. They didn't show that part on TV, I don't think, but [Matt] played 'Brownstone', and then I came up and played 'Sweet Child' and 'Paradise City'."