I think he does have 'some intentions', I can't recall completely but there was articles where he said he was looking at a few things with Weidman and Lapine, and in the Tony speech for his recent award there was some hint that he hadn't 'finished'. But he talks about how he is under pressure for meeting expectations, and that when you get older he becomes physically/emotionally.creatively tired easier and things.
Kind of paraphrasing and all what I remember, but I think he definitely is open to 'doing another musical'.
Give me claws and a hunch, just away from this bunch.