Ive come up with this as the storyline. I must state that this is after HotS's campaign and will contain SPOILERS
SPOILERS
Set a few days after the assault on Korhal. Kerrigan now off seeking Amon and having her Broodmothers prepare for the hardest battle they'll face.
Stukov went off on his own with a few of Kerrigans forces to assimilate a brood of his own. While seeking out a new place to start his brood, Stukov finds a planet
on the outskirts of the Koprulu sector. Little did Stukov know, this planet was unlike any other he has been on before. Lieutenant Thomas Dufay, now Admiral Thomas Dufay, was an original member
of the UED expedition force sent out to the Koprulu sector during the second war. He managed to evade the Swarm, when Kerrigan sent out to destroy all remaining UED. Now, Admiral Dufay, with a large UED force, seek
to strike the Dominion while they are leaderless, and take over the sector before Kerrigan can return with her swarm.
Ive come up with this as the storyline. I must state that this is after HotS's campaign and will contain SPOILERS
SPOILERS
Set a few days after the assault on Korhal. Kerrigan now off seeking Amon and having her Broodmothers prepare for the hardest battle they'll face. Stukov went off on his own with a few of Kerrigans forces to assimilate a brood of his own. While seeking out a new place to start his brood, Stukov finds a planet on the outskirts of the Koprulu sector. Little did Stukov know, this planet was unlike any other he has been on before. Lieutenant Thomas Dufay, now Admiral Thomas Dufay, was an original member of the UED expedition force sent out to the Koprulu sector during the second war. He managed to evade the Swarm, when Kerrigan sent out to destroy all remaining UED. Now, Admiral Dufay, with a large UED force, seek to strike the Dominion while they are leaderless, and take over the sector before Kerrigan can return with her swarm.
Storyline A would give more room for development, Storyline B seems easier to design though (albeit a much shorter campaign).
Thanks for the feedback TaintedDreams. Ive finalized my idea for the campaign im going to do. Expect a thread about it in the upcoming days.