  doctor spectrum is the name of several fictional characters that appear in publications published by marvel comics. there have been five versions of the character to date - three supervillains from the mainstream marvel universe belonging to the team squadron sinister (earth-616) and two heroes from different alternate universes. the two heroes each belong to a version of the team squadron supreme, the squadron supreme of earth-712 and the squadron supreme of earth-31916 respectively). ==publication history== ===doctor spectrum - the supervillains=== ====kenji obatu==== the first villainous version appears in the final panel of the avengers #69 (oct. 1969), the first chapter of a three-issue storyline by writer roy thomas and penciller sal buscema. the story arc introduced the supervillain team the squadron sinister, whose four members were loosely based on heroes in dc comics' justice league of america, with doctor spectrum based on green lantern.interview with roy thomas and jerry bails in the justice league companion (2003) pp. 72 â 73 the squadron sinister are created by the cosmic entity the grandmaster to battle the champions of the time-traveling kang - the superhero team the avengers. doctor spectrum battles the avenger iron man, and is defeated when the hero deduces that the villain's power prism (a sentient entity called krimonn) is vulnerable to ultra-violet light. the avengers eventually defeat the squadron and they in turn are abandoned by the grandmaster.avengers #69 - 71 (oct. - dec. 1969) doctor spectrum reappears in the title iron man and after a series of battles is defeated when iron man crushes the power prism. a powerless obatu is arrested and deported back to his native africa.iron man #63 - 65 (oct. - dec. 1973) & 66 (feb. 1974) ====billy roberts==== unknown to iron man, the power prism reforms and is found by a [[sanitation worker]
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