Over on his blog, writer Kurt Busiek shares some artwork from a pitch that once upon a time he and Karl Kesel submitted to Marvel called Avengers H.I.T. Squad. The "Heroes in Training" team would have featured Hawkeye teaching a group of former villains to be Avengers.
For a brief time, wasn't Rhino a good guy in the pages of Silver Sable? I wonder if Busiek and Kesel included him because of that, or if they had the idea first.