KRAD said:
Slings and Arrows is treating the year leading up to First Contact as if it were (sort of) a season of TNG airing at the same time as the late fourth/early fifth season of DS9. So the events are to some extent dictated by what was going on on DS9 at the time.
Part of the point of the miniseries is to show what the Big E was doing during this timeframe -- and also picking up on some of the TNG hits we got on DS9.
So Book 1 shows them dealing with a changeling infiltrator and spotlights Hawk. Book 2 shows what the Enterprise was doing during Leyton's coup attempt -- but also has Data dealing with his emotion chip and how it affects his ability to create art (and introduces the character of Padraig Daniels as the new security chief/tactical officer). Book 3 deals with one of DS9's TNG hits, to wit, Lwaxana's pregnancy in "The Muse," and also shows how and why La Forge switched from the VISOR to the optical implants. Book 4 focuses on Crusher and explains her animosity for the EMH as expressed in First Contact. Book 5 is another of DS9's TNG hits, showing how Riker deals with the Maquis and the betrayal of his "twin" Tom in "Defiant." And finally, Book 6 is a full-bore crossover, with the Enterprise going to Deep Space 9 and the two crews working together, and uses Picard's relationship with Gowron in the context of the animosity with the Klingons during this timeframe.