Brand New Day no longer needs to address Doomsday's event, and can happen in parallel to Thunderbolts*

Maybe even taking place in the gap months before the post credit scene

I could be mistaken but Pearson didn't say that about Zemo. He said it was only an idea that never went to light because it would be too obvious and not a different twist that surprise the audience.

I suspected Wanda would be #1.

When I finished watching Thunderbolts* the first line my friend said to his brother was, "I think Wanda would adopt Bob as her son or new brother right away if they meet."

It sounds silly, but I think makes sense. Wanda could sense what struggle Bob had gone through, and would instantly relate to.him. And Void's power is meaningless now that she has become Scarlet Witch. The 838 Wanda wasn't even her full power but could wipe out all but one Illuminati (Mordo). Full power Wanda would have no issues inside the Void's mental labyrinth.

I think Eric Pearson said Bill Foster was initially gonna be in the movie. But Ava's planned bonding moment with Antonia was changed. Maybe that decision rippled into eliminating Ava's backstory altogether.