Instead of Voyager being transported to the Delta Quadrant, it ends up being sent several years into the future in which the Dominion has taken over the Alpha Quadrant and most of the Beta Quadrant after winning their war aganist the Federation.
The United Federation of Planets has fallen. Humanity, once among the mighty leaders of the Federation, are now slaves living under the Dominion rule. The Klingons have been rendered extinct after they fiercely refuse to surrender to the Dominion. Starfleet has been reduced to a ragtag resistance movement who has more losses under their belt than wins. What's left of the Romulan Empire has gone deep into hiding. The Cardassians are another slave race subjected to Dominion rule after an attempted uprising among them cost them their freedom and their homeworld.
While looking for a way to go back to their own time, the Voyager crew fights to survive this dangerous future. They have to outrun the Dominion who want them dead, turned into slaves, or subjects of an interrogation on how they came to arrive from the past. They also find themselves contending with those who wish to use their ship for their own purposes like the Starfleet resistance movement. B'Elanna deals with the emotional shock of her people's extinction and the Maquis crewmembers are conflicted by the circumstances of the fall of their greatest enemy, the Cardassians. At some point, Voyager goes from looking for a way back home to fighting to save the people of the future from Dominion oppression.
This can be either the future if DS9 had ended differently or a future alternate reality.
The United Federation of Planets has fallen. Humanity, once among the mighty leaders of the Federation, are now slaves living under the Dominion rule. The Klingons have been rendered extinct after they fiercely refuse to surrender to the Dominion. Starfleet has been reduced to a ragtag resistance movement who has more losses under their belt than wins. What's left of the Romulan Empire has gone deep into hiding. The Cardassians are another slave race subjected to Dominion rule after an attempted uprising among them cost them their freedom and their homeworld.
While looking for a way to go back to their own time, the Voyager crew fights to survive this dangerous future. They have to outrun the Dominion who want them dead, turned into slaves, or subjects of an interrogation on how they came to arrive from the past. They also find themselves contending with those who wish to use their ship for their own purposes like the Starfleet resistance movement. B'Elanna deals with the emotional shock of her people's extinction and the Maquis crewmembers are conflicted by the circumstances of the fall of their greatest enemy, the Cardassians. At some point, Voyager goes from looking for a way back home to fighting to save the people of the future from Dominion oppression.
This can be either the future if DS9 had ended differently or a future alternate reality.