The mods timeline is after the events of nemesis, but before the events of Star Trek XI aka the reboot. The Dominion violate the ceasefire, and pour through the wormhole like a tidal wave. Reconquering, and enslaving Cardassia. Deep Space 9 is destroyed. The Cardassians are now nothing more than battle thralls, and canon fodder. The Breen were more than happy to re-unite with thier old allies. The relations between the Federation, Klingons, and Romulans are not as cozy as they once were. Petty mistrusts, and rivalries fragment the alliances. Each empire is capable of handling the new dominion threat alone. The fedration is fighting for its right to exist. The Klingons are fighting for honor, and glory. The Romulans are fighting because they must. The Dominion are playing the "lets you, and him fight" game.
Meanwhile the Borg transwarp hub was not as badly damaged as previously thought. The Borg now view the Alpha Quadrant factions thier most serious threat to the collective. Assimilation is no longer relevent. There will be only Annihilation.
The Alpha, and Beta quadrants are in a state of total war.
This prologue will be refined, and fleshed out later when i have more time.