Looking back at
this Bleeding Cool item from mid-2019, I'll always wonder what this referred to:
I believe the item is true because it feels like Wanda in particular was being "saved" for some story that would spin out of the "Pretender" business (otherwise I don't see why they'd have kept turning down pitches to use her during the run-up to her show). It certainly felt like Hickman was setting up something, though he might have been vague about exactly what it was going to be.
I used to think they were going to un-retcon the retcon and then got cold feet because of the MCU, but after Franklin Richards was declared to be not a mutant, I decided that probably wasn't going to happen (because whatever caused the Wanda/Pietro retcon is clearly still going on). Whatever it was going to be, it feels like it's something that got lost due to Hickman cutting his run short.
Hickman's "Empyre" story ended by hinting that Wanda would die ("Unless, of course, you can't live with yourself... unless, of course, you won't"), and it feels like they ended up making it into a small X-Factor murder mystery, only to then make it big at the last minute.