There is a community forming right now that aims to write a MOBA from scratch, mostly fueled due to the Vanguard incident on Linux. I am not affiliated with the project, but wanted to raise attention to it (as I am currently on cold League turkey since a month).
The announcement post on rEdDiT: https://old.reddit.com/r/opensourcegames/comments/1cz3212/open_source_league_of_legends_an_attempt/
GitHub: https://github.com/OpenChamp
Discord: https://discord.gg/f6DGjvTWYT
Related Lemmy post: https://lemmy.world/post/16065982
I wouldn’t say in the works, this is one person who’s a web developer posting on Reddit about an idea. In the works usually tells me they’re already working on the project, not trying to find people to help start it. GL to them I guess.