Dr Doom & Thanos VS Superboy Prime, Pre-Crisis Superman, & Doomsday
Dr Doom & Thanos VS Superboy Prime, Pre-Crisis Superman, & Doomsday
DOS Doomsday. doom and thanos are granted 5 hours prep time within doom's castle & have full details regarding their foes. doom may bring & share with thanos any device/object/artifact he wants.