I don't know any specific details, but he's been promoting DEH everywhere he goes - I think he really loves the show and is going to do as much as he can to get back to the show after the virus. He was just on Andrew Barth Feldman's Evan-centric Broadway Jackbox episode and I believed mentioned something similar, so...there's still hope?
This also brings up the question of other limited run "celebrity casting", like Sabrina Carpenter in Mean Girls, who got two or three performances before the shutdown and had a scheduled last performance on June 7th. A lot of plays this season also have pretty big stars who might not be able to extend (like Laurie Metcalf in Woolf, which most likely closed because of her inability to reschedule). Also, it might even be a risk to extend, given the unknowns of whether, even once Broadway reopens, there will be an audience that's ready for big gatherings.
"I think that when a movie says it was 'based on a true story,' oh, it happened - just with uglier people." - Peanut Walker, Shucked