Hopefully Elizabeth Olsen got a big pay raise when she inked her last contract extension with Marvel Studios, because Scarlet Witch is shaping up to be the single most important character in the franchise's Phase Four. Kevin Feige clearly had big plans in store for her after changing his mind and saying Wanda Maximoff had replaced Captain Marvel as the MCU's most powerful superhero, and it now looks like WandaVision is only going to be the tip of the iceberg.