While Kevin Conroy is perhaps best known for playing Batman in several different animated series, he also provided the voice of the Caped Crusader in all three Rocksteady Batman Arkham games. The last game in the series, Batman Arkham Knight, came out in 2015 and seemed to mark the end of the series. According to Kevin Conroy, it is.
Conroy was asked about the possibility of a new Arkham game during an interview with The Movie Dweeb. In response, Conroy said:
I wish she was, I really would. Because people keep asking. You must understand how expensive they are. They cost a fortune. They take years. It took two years to create Arkham Knight, and it was a huge secret, no one could know about it.
Although Conroy is quite certain that a new Arkham game is not in development, it’s worth noting that he admits in interviews that the creation of such games is a closely guarded secret, so it’s unlikely that he would say anything about its existence.
That said, it probably shouldn’t be too surprising that the Batman Arkham series won’t continue anytime soon. Rocksteady, the developers of the original trilogy, have moved on and are building Suicide Squad: Kill the Justice League in the same universe, and Warner Bros Montreal is currently working on Gotham Knights, a game where Batman is (presumably) dead.
It’s possible that Batman will appear in Suicide Squad: Kill the Justice League, as we know he’s canonically alive at the end of Arkham Knight, though that seems unlikely given the focus on the rest of the League. Although Batman appeared in flashbacks in the Gotham Knights trailers, he was not voiced by Kevin Conroy and does not belong to the same universe as the Arkham games.