Other than a song or two at a special event, it's not likely to happen. For one thing Fast Eddie and Philthy Animal are also quite old. Doing a tour can be extremely stressful. Lemmy can do it but there aren't too many musicians near that age that can do it.
I'm lucky to have seen the current lineup and the classic lineup. I had more fun seeing the current lineup (the time I saw the original band was kind of like a nightmare - too many negative things happening at that show.) I did not enjoy the show with the classic lineup at the time but I'm really happy to have seen it in hindsight though.
It's about as likely to happen as Lemmy rejoining Hawkwind.