This might be a little similar to my My Responsibility one-shot, but what if the black cosmos stone was either in the past, that is much closer to the present, like when the parents were young, or in the future where the D-Team would meet younger Ancients while the Alpha Gang would meet their brother, which would 1) give him so deserved screentime and 2) go perfectly with the A-Team backstory that was revealed in the previous arc?