The theory is that Loki’s show is about the alternate timeline Loki, yeah. It’s confirmed it’s about him travelling through history and famous historical moments so it makes sense. WandaVision is theorised to be about Wanda and Vision in the present.
Shuri has Vision’s data from Endgame so she can easily rebuild him. From Infinity War, sorry. And then it can lead to their kids, Speed and Wiccan becoming a part of the Young Avengers. And Falcon/Winter Soldier could easily be about who becomes Captain America.
They could argue about it and shit. And BW’s is set in the 90s, iirc.