any cc0 lawyers able to answer a quick question?

maybe overthinking, but I would hate for someone to steal a higher "trademark" and sue everyone in the community or something

is there a way to take Higher as a brand and make it cc0 indefinitely?

cc0 doesn't extend beyond the first generation of the IP. It basically just makes it not IP..
But you can still defensible IP on top of cc0 but harder..

Building entertainment IP-as-Protocol to bring storytellers, holders, and fans together /crypto-z

You could still protect your brand by registering a Trademark as CC0 only applies to Trademarks.