If Marvel's CGI budget is getting stretched to the breaking point with stuff like Quantumania, I think we might want to wait a computer generation or two before asking a D&D movie to attempt to do better.
That would be genuinely great to hear. I think the film was much better than the perception of it in the larger community. It wasn't the breakout hit that some were expecting, but it was actually a fun film.
For something on the scale that was suggested, it's going to need a lot of CGI, which is why Quantumania ran into trouble -- just too much to do with the staff and time allowed.
They could Doctor Who it, and it could turn out the Sigil and most of the other planes consist of passageways lit in different ways, or endless quarries, but I think most people would find that pretty disappointing.
Better that they follow in the footsteps of Vox Machina and do a Planescape animated series, if they're going to use it at all. Let the live action movies be a bit more grounded and reasonably budgeted.