- Though Iron Man and Fantastic Four had their own animated series airing around the same time as this series, only X-Men takes place in the same universe (Earth-92131) as this series, while the other two take place in Earth-534834.
- Earth-534834 was initially provided in Official Handbook of the Marvel Universe A to Z #5 as the reality designation solely for Fantastic Four. Iron Man and The Incredible Hulk were originally assigned Earth-569386 and Earth-400285, respectively, but they were later folded into Earth-534834.
http://tvtropes.org/pmwiki/pmwiki.php/Trivia/SpiderManTheAnimatedSeriesS05E09SecretWarsPart1Arrival
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