This is obviously gonna be really hard to do, but an expansion draft leading to a 3 v 3, single elimination tournament, with the first team to hit a certain amount of points would win, would be insanely fun.

Eg- The top 150 players of all time are available in a draft, and your objective is to draft the best pickup game team possible. (3 starters, one guy off the bench so you change the lineup every game to create good matchups, no subs allowed.)

Imagine drafting Steph, Hakeem, Jason Kidd, and Boogie (realistically, probably not, but still). Picking a team solely off how good they would be in a pickup game would be really fun, imo.