UHC Challenge Ideas

I was going to do a UHC Origins, but with the new Minecraft Version coming out, the Origins mod is going to be a LONG time before it gets the pale gardens. So that kinda sucks, and I'm looking for new ideas.

One is the Far Lands, or what I called the Long Road. You basically start at 0 0 and then pick a direction, and start pathing a road to the world border. Would that be fun to experience?

Another is allowing maybe datapacks for certain things? Like for milestones of survival I can "unlock" new things? Or make the world harder?

Idk, I'd like some ideas. What would be a good spin on UHC that would be entertaining to watch?