As sad as it makes me to say it I think if Brian wants out it's time for them to hang it up... or at least just get together once or twice a year for nostalgia until someone drops.
I'm a Bon fan and much prefer that era but Brian stepped up and gave them a good many years. With the dementia issues, legal problems and just getting kind of lame and silly with age (but not to the point of total embarrassment yet like with other bands) I don't see anything worth clinging to.
Also... Brian's voice was pooched from the beginning. Interesting sound for the studio but live it's just been croaking for many MANY years. Dude must have noids on his noids. Sounds (and looks) like he's about to shart out a kidney.
If this Axl thing is true (haven't even bothered looking) the band is done.