Returning villain idea

I'm watching "Brain of Morbius" right now (yay BBC America for showing Fourth Doctor episodes!), and I'm getting reminded of what a fantastic villain Solon is. Wouldn't it be great to have him back on the show?

And okay, I know he's dead, but that's never bothered the Doctor Who writing team before. I've honestly lost track of how many times the Master has died and come back. And besides, does anyone really believe that Solon lived on Karn all that time without managing to get ahold of some of the Elixir of Life?