I think a reboot of the Flames of Recca anime like Shaman King would be cool to see. Especially if they adapt the final arcs of the series.

For a live action show, I guess maybe Shadowhunters but it’s more a bit more accurate to the books or maybe adapt different series from the Shadowhunters chronicles

A remake for the first 5 seasons of Supernatural would be good as well but not right now. Maybe in 2030 or something.