Here's some scoop on Arrow from this week's (Posted on 4/6/17) Ask Ausiello column.
Question: Will we see anymore Arrow flashbacks into Felicity’s past? —Jennifer
Ausiello: I cannot guarantee that Felicity plays into them, but EP Marc Guggenheim said that since all of Stephen Amell’s scenes in the Olicity-centric Episode 20 are with Emily Bett Rickards, the Russia flashbacks will get a week off. Instead, “The flashbacks are to a different time period, as we occasionally do,” he shared. “They take place between Seasons 4 and 5.”
Link to the full article:‘The Walking Dead’ Season 8 Spoilers: Will Steven Yeun’s Glenn Return? | TVLine