Marvel Studios Has Ironed Out Rules for the MCU Multiverse

The Marvel Cinematic Universe has slowly been gravitating toward establishing a larger multiverse, and following Loki’s surprise ending, it seems like the future for the MCU will feature a ton of multiversal travel. 
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During a recent interview on the D23 Inside Disney podcast, Marvel Studios president Kevin Feige spoke about the Multiverse and how Marvel plans on handling it, including the fact that th