There was actually a story on EW.com where Gwyneth Paltrow addressed the possibility of her returning to the MCU yesterday. She said she would be willing to, but only if it was a small part she could do in a day or two. She's mainly focusing on running her wellness and lifestyle company, Goop, these days.
The Young Avengers team that they appear to be setting up, with Kate Bishop, Wiccan and Speed, Stature, and possibly Ms. Marvel and Iron Heart, was a modern day team. They started up after the Avengers disbanded following Avengers Disassembled, around the same time Cap started the New Avengers.
Technically Ms. Marvel & Iron Heart have never been Young Avengers, they were actually part of the Champions, another teen team set up after the second Civil War, but I could see them making them Young Avengers instead for the MCU.