I’m planning on making my own edits for all four of the DCEU films, the ones I’m most interested in being BVS and ZSJL. For ZSJL specifically, I’d keep the 4:3, but cut out stuff that doesn’t need to be there, and have the whole thing be around 3 hours long.
One of my main inspirations for this edit would be this article-
https://thomasflight.substack.com/p/recutting-the-snyder-cut-thomas-flight
Keeping the aspect ratio intact and 3 hours runtime sounds all good to me! I also agree with basically everything written in the article. There is a good movie hidden under heaps of excess and I think you’re on the right track to unearth it. Good luck with the edit!