Supes 1 Million has a disgusting amount of power, apparently. Including magick and psionics, as well as a big boost to all of current Superman's powers. Post Crisis Darkseid gets eaten, Pre Crisis goes and gets a Thanos-sized fork.
Depending on how powerful all of Superman 1 Million's abilites are (how good are his tp/magic, how big was the boost from normal Supes) and assuming that Darkseid is post crisis, Thanos and Glads could take it. But I severely doubt.