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