So, I just spent the last few days playing through the SC and BW campaigns. After doing that, I came up with a list of holes that Blizz can exploit for the SC2 campaigns. I didn't read the website, so this is my speculation
-Raynor's still alive. He's not with Mengsk though. Perhaps he starts his own little faction. I think he'll be a big player though, considering he made a promise to kill Kerrigan
-Kerrigan reigns supreme, and starts expanding Overmind style. Of course, she could also get killed, whether by Raynor, Zeratul, or the slough people after her.
-Samir Duran's somewhere. The Secret Level hinted that he's with the Xel'Naga, and that they're still alive as a race. They just cloaked themselves under a Terran facade.
-There's a new race of protoss-zerg hybrids that are in as heroes, and they smurf things over. Hell, there might even be 5 races rather than 3. They introduced Night Elves and Undead in WC3. Why not SC2?
-Zeratul's in hiding. At the end of BW he parted ways with Raynor (they weren't that good friends anyway; just respected comrades). Perhaps he teams up with Raynor again. Wouldn't surprise me. It also wouldn't surprise me if he became the Patriarch of the Dark Templar. Or he has absolutely no role since the SC2 preview set the Protoss as a much more robotic race than usual.
-Where the smurf is Artanis? Last I saw of him was on Shakuras, and he made a little cameo in the final Zerg mission. Other than that though, he pretty much dropped off the face of the universe.
-Fenix came back from the dead once. Why can't he do it again? I say he's an immortal with both a heavy impact shield and a regular plasma shield.
-Mengsk is building up his dominion. He's probably the new Terran Confederacy, and there's a new rebel faction out there. Probably led by Raynor since they hate each other.
-Somewhere along the line an new Ovie forms and fucks over Kerrigan for a while
-There's bound to be a falling out among the Protoss heroes. Happened in both SC and BW. Maybe the Conclave or the Templar Judicators stage an insurrection considering much of the power went to the Dark Templar towards the end of SC and BW.
-The Protoss took over at the end of SC. The Zerg after BW. The Terran definitely need their turn. Somewhere along there, I'm guessing Raynor and company turn against Mengsk and Zeratul. They probably get in the way of his personal goal to kill Kerrigan.
Post your speculations here and discuss.