Bon Jovi will never be iconic, very very few bands are...... For instance, I wouldn't say Bon Jovi are one of those acts that everybody who likes rock music has to see..... in the way Dylan, or Sprinsteen, or Yes are..... Brilliant as they are, and as amazing as they were, they're not one of those legendry bands. Thus I'd say they can only continue to go on if they either..... a)get more and more pop orientated, as soon the die hards are going to give up, and it's going to become an increasingly big charts/sinlges fna bass. b) return to their roots, either TD or earlyer, in which case they'll gain more respect, possiably sell less, but will have a stronger fan base.
Most likely I think they'll just meander along, and after a few years/albums probably decide to either pack it in, or revert back to how they used to be