Sorry to res this. But amazed no one's mentioned that Doomsday has been defeated permanently. Imperiax destroyed him completely, vaporising him on an atomic level, they outright stated he could not come back, and so eventually they had to clone him. This is a good enough answer if you believe a being isn't the same as his clone. And that is too much of a philosophical question for to answer definitively.
Even if that's not good enough for you, given the Imperiax instance, on canonical powers alone, Doomsday can be destroyed, and they have stated that he cannot regenerate from nothing. There has to be a sample of him left. The, "but doom always comes back!" maxim only holds true as far as the writing makes it, but its not guaranteed through the character's inherent canonical abilities. It relies on other characters in many cases. So in theory, if one could make sure no extraneous samples of Doomsday existed anywhere, and one had the power to disintegrate Doomsday (Imperiax, or many of the atomic level reality warpers, & higher end powerhouses listed above) - then Doom dies, AND no more doom. Additional safety precautions - any character that could alter memory on a mass scale could ensure no characters even remember Doomsday to try to intervene and or clone him. But that's going above and beyond, because once the floor is open to other powerful characters helping resurrect or recreate Doomsday, then the question is about as useful as "can any DC/Marvel character be destroyed permanently" - which is a valid question. But not particular to Doomsday.
Log in to comment