Board Thread:Questions and Answers/@comment-1894786-20160711053400

If this has already been discussed before, then I apologize. But while surfing through the Marvel Database, I noticed that these two stories are flagged as being part of Earth-199999, aka the Marvel Cinematic Universe. There might be other comics aside from the movie tie-ins, which I will look for, but these two are definitely stand-outs.

In "Red Widow: First Strike", which comes as the second story in the "Mockingbird: S.H.I.E.L.D. 50th Anniversary" one-shot, we're introduced to Ava Orlova, a girl once rescued by Black Widow and who eventually becomes a vigilante named Red Widow, working out of New York City, specifically Brooklyn.

In "Black Widow: Forever Red", we continue Ava's story and also eventually meet Alex Manor, AKA Alexei Romanoff, Black Widow's brother.

It should be noted that "Red Widow: First Strike" is a prelude to "Black Widow: Forever Red", and the author of both stories confirmed that Forever Red is set in the MCU, implying that First Strike is as well. 