Original Sin was the death of the Watcher, and possibly a portend of the end of the FF and the Multiverse. Nick Fury had determined that the Watcher was useful as long as Uatu prolonged his role of exploring all the Multiverse and giving Nick Fury vital intel on possible threats. As soon as the Watcher lost confidence in his fathers vision of interference, then Fury had no more use for a Watcher that stopped watching and killed him.
We know Nick Fury is still chained to the moon after Secret Wars, but, could Uatu be back, and can he release old Nick from his chains? I think the Watcher needs to be there for his son and his wife, and, Reed Richards could give Uatu renewed vigour to go after Uatu’s fathers vision again.