Wanda & Pietro Mutants in The MCU: Quicksilver & Scarlet Witch are the only two mutant characters that have appeared in the MCU. That’s because these are the two characters who have switched between the X-Men and Avengers multiple times. So, both Marvel/Disney and Fox had the rights to use them. But due to the … Continue reading MCU Theory – Wanda & Pietro Were Always Mutants in The MCU