Thing is, he doesn't need the names "Powermonger" or "Syndicate" to make sequels to those. Chris Taylor remade Total Annihilation as Supreme Commander, and it was a sequel in all but name (and a damn good one, too). All you need is the name "Molyneux" with "Powermonger-style game" and everyone will know what he's doing. Syndicate and Dungeon Keeper rank among my all time favorite games, and I'd love to see them remade or re-imagined.
Here's to hoping he stops making crap like Fable 3 (Sorry, I played for a couple of hours and simply could not get into it) and goes back to his roots: great strategic/tactical titles with a sci fi or fantastical bent.