Let's get some things straight:
1. Starcraft 1 and 2 are apart by thirteen years (not four), do the math blizzard.
2. I'm adding characters from 'Starcraft 2: Annihilation' like the RSSI.
3. The story will take place on the WOD (Warlords of Draenor) Draenor, because of the environments. And after 'Wings of Liberty'.
Other than that, enjoy the story.
The Terran dominion was changed in the span of a few weeks.
With the help of High Prince Valerian Mengsks and General Horace Warfield, the Raynors Raiders were able to sneak into the Korhal Imperial Palace and kill or capture most of Arcturus' advisers and military officers, including the Emperor himself.
Valerian took the throne and began to reform the Dominion. He arrested many Dominion Security troops and officers- being most of them were cold blooded killers- and began inviting people to join the new security force, to truly protect the citizens, and sent entire fleets of relief ships to worlds that were attacked by the zerg swarms. But the new Emperor had help, Matthew Horner was promoted to Admiral and was tasked with down the remnant of Arcturus Mengsks followers and bringing them to justice. The Mobeus Foundation (plus its corps) were tasked with helping the Dominion rebuild. Warfield was ordered to eradicate the remaining zerg. With their queen now human again, the swarms scattered to the wing and the General wanted to stay scattered. And Raynor… well, during a mission on Monolith to retrieve a Xel'naga artifact he and his Raiders rescued a tribe of Protoss called the On'dunnar. These Protoss left Aiur during the Aion of Strife (a time when the Protoss tribes warred with eachother, and before the Kalhai). They weren't warriors, but scholars, they only a Guardian who controlled the statue protectors. But when the zerg invaded, they didn't stand a chance, without help from Raynor. Jim's experience with the Protoss made him the perfect candidate to be ambassador of the Dominion to the Daelam (the united Protoss people). The Twilight Council (the leaders of the Daelam) asked that Guardian Kadurasos of the On'dunnar to represent the Protoss, because of his experience with the Raynors Raiders.
Things were looking up for humanity.