I thought this was another solid issue. This series is quickly becoming my favorite Captain Marvel book since KSD's run. But I find it odd that people are making such a big deal about this "retcon."
For once, it's assuming a lot. We don't know entirely what we're looking at with that final page. There's still more story to tell. Even if it is what we assume, it really doesn't change much about Carol herself or the events that made her who she was. It just changes her family circumstances, which have never been too big a part of her story. I still think it makes for great intrigue, but it's not the kind of groundbreaking retcon that I see some claiming.