Neither. No reason #24 should be retired, imo.
If you look at the 6 numbers that are up there, is there any way that Probert or Chelios can compare? I know one was a fan favorite, and I know that another played with us for 10 years. They had their ups and downs, and are beloved members of the Red Wings alumni, but neither had the kind of exemplary career that would warrant a number retirement. Had Cheli been drafted by the Wings, and played his entire career here, you *might* have an argument for his number, but that isn't the case, so it's a moot point.
IMO, the current standard seems to be the best, and that is the standard that Yzerman set. I realize that that might be setting the bar a bit high, but isn't that kind of the point? Number retirement is the highest honor the Red Wings can give to a player. If you give it to #24 (either Probert, or Cheli), doesn't that then seem to cheapen it for the other absolute legends that are already up there?
There are more Red Wings players in the Hall of Fame (49) than there are with retired numbers. IMO, that's the way it should be.
The only current or former Red Wing right now that I would even consider as being worthy of number retirement is Lidstrom.