I just dont see anyone able to do what Eddy did over the course of his career. Granted Pro cycling has changed so much since Merckx raced, teams are much stronger now imo. bikes are way better, that sort of thing. I mean never say never right? Someday someone will come along and at least make us think its possible, but damn it would be tough. What it must have been like to follow his career at the time.
Is it possible? I guess, maybe.