I’m pretty sure as long as u claim it as a remake it’s fine. Ppl have remade cp so many times, it only became an issue with Disney cuz CP Rewritten ended up getting involved with tons of drama and allegations of—(you what I can’t even explain the lore goes so deep)

tldr, yes, a lot of mmos function the same ur not gonna get in any legal trouble. If u worried, label it as a parody