Editor's Note: the following article is entirely non-cannon. Castlevania Resurrection was a canceled game for the Sega Dreamcast. Its story is preserved here, in the most appropriate section of the site, but as the game was never released, it holds no place in the official continuity.
In the year 1666, during the time of the Great London Fires, dark magics have been aligned to resurrect Dracula -- dark magics under the control of the Countess Carmilla (presumption here, as all the media for the games called her "The Countess" -- unless she was a new character, though, Carmilla is the best fit for this role). Carmilla uses her magics to distort reality and bring about Dracula and all his minions to the plains of man.
But the forces of good (call them the Powers That Be, if you will) have also come together. To fend off an invasion of Dracula and his ilk, they have summoned two warriors to 1666 from across the time-stream: Sonia Belmont, warrioress and vampire hunter, and Victor Belmont, soldier of fortune and reluctant heir to the clan. These two are bestowed with a quest to venture deep into the newly conquered lands of Dracula, defeat Carmilla, and send Dracula back to the Hell from whence he came.
During the journey through Dracula's castle, the two heroes would learn more about their quest, and themselves. Sonia would find the answers to why she was resurrected long after her own time (and her death in that time), while Victor would find the courage to face the past he ran away from. In the end, as stronger, better heroes, the two defeated Carmilla and Dracula and saved the day once again (for at least a whole four years, which in the Castlevania series has to be some kind of record).
Much of how the game would have played, and what the plot through the game would have been, is unknown. Few team members from the project have said anything about Resurrection. It is known that the game would have been five stages long, but they would have been very lengthy stages. How many of them would have taken place in London, or in Romanian is (of course) open to debate.
Speculation and rumors have it that Sonia's quest through the game would have been told as a direct sequel to her only other game, Castlevania Legends. How that would have worked, and if Alucard would have made yet another appearance (to hit on any blond he could) is less clear.
Meanwhile, Victor's quest would presumably have been full of him talking about how he never wanted to be an heir to the clan, having run away from home at an early age. Presumably, he wouldn't have even used a whip, having other skills and powers he picked up during his time abroad as a soldier of fortune.