I am waiting for a resolution of a Wikidata bug - https://phabricator.wikimedia.org/T112647

That's the only technical blocker I'm aware of. The renaming _will_ work without it, but interlanguage links will be buggy, and I want to avoid it. I'm poking Wikidata developers about this periodically.

Once that is done, I'll get to the next stage of actually starting the renaming process by asking the community, and when that will be resolved, I'll move to the technical renaming stage.