I am strongly leaning toward the idea that whoever wrote that article just predicted the cast based on the lineup in the first arc of the original comic.
The other rumor, that they're
working on a "New Avengers" that might include some of the younger heroes, seems more plausible to me.
Everyone talks about the Vision/Scarlet Witch series setting up Wiccan and Speed, and I suppose it could, but I also know that their backstories don't make any sense because of the timelines (which has been lampshaded in the comics) and the MCU rarely does anything even half that convoluted. If Billy and Teddy appear in the MCU I expect them to have significantly different backstories, and maybe be inspired by their favorite heroes instead of actually being descended from them.