Rich Johnston said in 2019 that they were planning this event for 2020.
They delayed it because they were concerned about confusion with WandaVision, where Wanda is not a mutant.
WandaVision was scheduled for early 2021 in 2019, briefly moved to December 2020, then eventually to January 2020.
This suggests that Wanda is going to be dead for quite a while, as this event would have likely started roughly this time last year, long before WandaVision.