I don't know... While I think that Howard can capture both the drama, sorrow, and foreboding threat of The Batman, I'm concerned with Zimmer. Don't get me wrong; I love Zimmer (particularly Gladiator and Crimson Tide), but my concern here is that his music tends not to be subtle or especially scarey, two components I've always thought essential to any decent Batman film. Indeed, while I like Elfman's rendition, I never thought that it really captured the drama, sorrow, and foreboding threat of the title character. Sure, it was awfully swashbuckling, but there needs to be a degree of sorrow and horror wrapped up in the score.
Still, I'm sure this will be interesting never the less.