The end of “Fadeout” revisited Felicity’s scene with The Monitor from the Season 7 finale, which evidently still happened despite the “Crisis on Infinite Earths” changes that made the hellish Star City 2040 of Season 7 flash-forwards into the peaceful Star City 2040 of the Green Arrow & the Canaries backdoor pilot.
So, off they went to the “afterlife,” as Felicity call it!
Despite The Monitor’s warning that there would be no coming back from where they were going, Felicity was sure that she was ready to reunite with her husband after 20 years of separation.