I wonder if Hiroshi Shiibashi can come back with a continuation of Nuraryhion no mago, now that he has two failures, the same way that happened to Nobuhiro Watsuki who after Buso Renkin and Embalming went back to doing Rurouni kenshin.
I wouldn't consider
Buso Renkin a failure. It didn't run for very long but had a graceful ending, to my knowledge sold rather well in the long run and got a decent anime adaptation. It was a very fine traditional shonen series, imo.
Dunno how successful
Embalming was. I kinda tried following it on&off but it seemed like kind of a mess. Still, even though it "only" has 10 volumes, it ran for 8 years.
Your comparison is still somewhat fitting, considering that Watsuki also had
Gun Blaze West, which completely tanked, and how successful Kenshin was/is in comparison.
Not sure if just everyone can just whip out their old success and remake it, though. It seems safe at first glance but I assume that it would happen more often if it was without problems, especially if the idea has already been milked dry. Are there more relevant examples aside from Kenshin (not counting franchises in different hands like with Dragonball)?