'Batman of the Future,' I haven't heard of. There's a 'Batman Beyond' that has Bruce Wayne in his mid seventies to eighties, mentoring a new Batman in 17 year old Terry McGinnis.
When I first saw it, I was skeptical, I hated to think of anyone but Bruce Wayne as Batman, but then the show grew on me. A lot of die hard fans don't go for it, but I think it's a great animated show. In fact, I think 'The Return of the Joker,' a Batman Beyond movie, is much better than the last couple of live action movies they've put out.