#OnThisDay in 1946 #SivanaJr debuted in #CaptainMarvelAdventures #comics #52 #ThaddeusBodogTheYounger son of #TheOriginalCaptainMarvel’s #archEnemy & #TheWorldsWickestBoy studied #AncientAtlantisScrolls for a failed 40s plot also got pop & #TheMarvelFamily et al trapped in #Suspendium for 20 years!