Bret Hart vs Ricky Steamboat.
That match did happen...once.
Unfortunately, it was not televised.
Bret was supposed to put Steamboat over at WM 2, but plans were changed at the last minute and the HF was thrown into the Battle Royal, while Ricky got Hercules.
Bret was really disappointed in losing the opportunity with Ricky, but the two still had a pre-WM spot show match.
Ricky knew Bret was upset, and so he told him, "Hey, let's go out there and show them [management] what they're missing."
Bret admits that Steamboat worked extra hard to give him a great match and make him shine.