In all honesty, I'd really doubt a Batman TAS revival could live up to the old show. I mean, even with the show itself, the second season wasn't as good as the first, and The New Batman Adventures was another step down. Bringing Paul Dini back would probably ensure good writing, but another problem for me would be the animation. Part of what made the first season episodes so fantastic was that they were still experimenting with what was possible. Later on, even as Bruce Timm described it, they had figured out the most efficient way to animate, but it also lacked the ambition of the earlier episodes. With todays animation, even looking at the Animaniacs reboot, it looks fine, but not as brilliant as the original show, so there's no way they'd go with more classic animation techniques as they did for the early episodes.