Kevin Conroy may be playing an older version of Adam West's Batman in the Arrowverse crossover, "Crisis on Infinite Earths". West is one of the most iconic versions of the Caped Crusader, having played the character in the campy 1960s Batman series on ABC, and the movie that followed it. West has also voiced the character in various cartoons. The celebrated Batman star passed away at the age of 88 in 2017.
It was announced in August that Kevin Conroy was to be the Arrowverse's Bruce Wayne. Conroy has been the voice of Batman since the early 1990s, and has voiced the character in over a dozen animated movies, but "Crisis on Infinite Earths" will mark the first time Conroy has portrayed Batman in live action. Conroy is one of three actors associated with Batman movies appearing in the crossover, with the other two being classic Robin actor Burt Ward and Robert Wuhl from the 1989 Batman movie.
Set photos from "Crisis on Infinite Earths" have shown Burt Ward dressed in the colors of Robin. Ward portrayed Robin in the 1960s Batman series alongside Adam West, so there's been speculation that Ward is reprising his role. It seems like a reasonable conclusion, considering that Robert Wuhl, Ashley Scott, Tom Welling, and Erica Durance are all playing the same versions of their characters. So if Burt Ward is indeed an older version of Robin, what will "Crisis" do about his universe's Batman? It's possible that Kevin Conroy is actually Adam West's Batman to Burt Ward's Robin.
If "Crisis" is using Batman and Robin actors who are both over 60, this may not be a coincidence. The two could be from the same universe, and may be paired together in the crossover, as opposed to being from two separate timelines. Conroy's role has been described as a "special guest appearance from the future". This "special guest appearance" could incorporate Ward's character as well. What hasn't been said about his character is whether or not Conroy is any version of Batman. So far, it's only been confirmed that Conroy is playing Bruce Wayne, which could mean his Bruce Wayne is someone who never became a vigilante. So if Conroy is Adam West's character, it would give the Arrowverse its first actual Batman.
Without Adam West, "Crisis on Infinite Earths" can't perfectly recreate the Dynamic Duo from the '60s series. But, it could be that if the point was to use an actor who can play someone as iconic as Adam West's Batman, their only option was the next best thing, which is of course Kevin Conroy. Conroy has been associated with Batman for over 25 years, making him an ideal choice to play the Caped Crusader.