Why not have a women be Captain America now? Steve Rogers can’t be that person now. Captain Marvel could replace Cap at the moment, and her costume is almost the right colours, but she needs white. But Carol Danvers had to leave Earth after Secret Empire and go to space for whatever she did in that Event. Which leaves it open for someone like Roberta Mendez to take over the role. If Thor was such a success with a woman, why not Cap? I’ve read Spider-Man 2099, and I think Roberta was a pretty good Captain America. (You get Angela, Thor and Roberta together - that would make an awesome team).
Why I suggest this is because, it would be a good transition between Steve’s discovery tour of America, and having someone fill the void Steve leaves. I like the idea that Roberta has a split personality, that the government can manipulate, and there is plenty of potential for Roberta discovering 2018 America, coming from an Alternate future. I know Steve Rogers comes back for a crisis Avengers event in January, but he may just jump into that like he did in Siege, and disappear this time, still uncertain about if anybody can trust him. But Roberta has no strings attached to her, either in her future, or by the public in 2018. We’ve had Cap according to the WWII legend, the sidekick Bucky version, and the African American Cap. What about this new take on Captain America? Roberta already exists and has had experience in the role already?