I know he had a short comeback, but one Legend who I would like to see on a regular basis would be my all-time favourite, Ricky "The Dragon" Steamboat.
Firstly, the guy can still go, as evidenced by the chants of "You've still got it!" when he fought in the WM25 match against Chris Jericho two years ago. He could also bring it at their match at "Backlash" a month later.
I initially thought that, if "The Dragon" made a comeback, today's fans would boo him, as he was a classic, polite, babyface. I am glad to see that even today's fans can appreciate Steamboat's greatness.
Also, Steamboat is the greatest WWF/E superstar never to have held the WWF/E or World Title. If he came back, a short stint as champion, to further a feud with an up-and-comer would be great.
I also heard that a future season of NXT is themed by sons of Legends being mentored by their famous fathers. I heard one contestant is Richie Steamboat, the son of Ricky Steamboat, who "The Dragon" will train on the show. I would like to see Richie win, and then come to WWE, with his father at ringside as his manager. I even think that, if Richie shows his father's talent in the ring, that they should do a storyline where Randy Orton tries to recruit Richie to be part of the new "Legacy". "The Dragon" warns his son against joining, but eventually Richie is tempted to the dark side. Ricky won't fight his son, but Richie provokes him, and eventually Steamboat makes the heart-breaking decision to fight his only son, in a first- the first-time ever that father versus son at Wrestlemania! If Richie is up to it, that match would be awesome, and would tell a good story.
But I don't think Steamboat would agree to a full-time comeback, as he seems content to teach today's stars, and help their careers instead.