39 years ago - Katarina Archer is born.
23 years ago - 16-year-old Katarina becomes a nationally ranked pentathalete & competitive shooter.
21 years ago - 18-year-old Katarina begins studying criminal justice while participating in several agency training programs.
18 years ago - 21-year-old Katarina graduates & becomes a low-level CIA operative, beginning a 1-year period of gaining qualifications from different organizations.
17 years ago - 22-year-old Katarina becomes a Checkmate agent, & takes the Spy-Smasher identity as her callsign.
7 years ago - 32-year-old Katarina is revealed as a double agent. She loses her Checkmate clearance.
1 years ago - 38-year-old Katarina tries to take control of the Birds of Prey as her own task force.
The second Spy-Smasher was an invention of Gail Simone, one of the greatest content creators of the modern era of comics. She was part of a single arc of her seminal Birds of Prey series. Katarina Armstrong was a descendant of the original Spy-Smasher, and in the splash page that introduced her, we learned that she was an operative of dozens of intelligence organizations (although... is one of them 'nasa'? how does that work?), and that she was sent to assume control of the Birds. Watching them band together to stand up to her was great, and it gave us one of my personal favorite spreads ever, when every character to ever work with the Birds joins together in a single three-page fold out image.
Katarina fits in fantastically with our need for a liaison agent for the early incarnation of the modern Freedom Fighters before the team is reassigned, because while she's definitely a force to be reckoned with we are in no way meant to trust her. This is a team that SHOULD be distrustful of the organization they work for, and she's a great face for that. Her dismissal after her double agent status is revealed completely leaves her open for her interaction with the Birds of Prey.
The only difficult part of including her is somehow coming up with an explanation for her status as a top-ranked operative of so many organizations. The fact is, doing that just isn't feasible if we're trying to craft a realistic version of her personal timeline. It makes more sense, and fits the character, if we make it something she set out to APPEAR to do, just to bolster her image as a super-agent.
Also, there's really no way for her to actually be a descendant of Alan Armstrong, because that would establish a connection between our modern "number of years ago" timeline and Alan's timeline with given dates. Rather than try to work around it, we just made her "Archer" instead of "Armstrong". The fact that she tries to use his name as her callsign feels like a bit of an affront to him already, so this makes even more sense.