If he didn't become so severely typecast as Robin, could Burt Ward have had a substantial acting career post-Batman?
The big myth that is often brought up is that Burt was considered for the Benjamin Braddock role in The Graduate. That's the role that of course, ultimately went to Dustin Hoffman. But Burt had to turn it down (or it was turned down for him) because of his contract with Batman.
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While I don't think that Burt Ward had the acting chops of a Dustin Hoffman, he was admittedly, a very handsome guy in his youth. Burt had I would say, a vibrant boy next door vibe to him, like his successor as Dick Grayson, Chris O'Donnell possessed. What I mean is that even though he was good looking, he didn't seem to pose too much of a threat to other guys, who would be worried that he would steal their girlfriend.