However - I would recommend not creating separate projects for each map...it will lead to spam and getting the projects taken down. Please combine all asset uploads into one project.
As far as the idea I think a "B" canon version of an alternate timeline of Starcraft2 is a great idea. But there should be a clear deviation of where the timeline alters. Lets say Raynor is sitting at Joey Rays and someone from the timeline comes back and disrupts the timeline. Heck...lets say its someone from the future like Artanis, but on the brink of death, saying they never should have turned Kerrigan into a Xel'Naga...then he gives Raynor something, or sets him up for a task. Boom. Then you're free to make whatever maps you want. But I wouldn't completely dismiss canon lore...IE - Valerian isn't a bad guy, he historically hates his father from canon books and SC2, etc. But lets say in this alternate version, Artanis (or whoever/whatever) comes back to try and stop the future from happening. Sure it completely dismisses ALL of starcraft 2 and like 10 years of Blizzard story telling, lol, but its a fun idea!
Think...red alert for starcraft. Maybe in this alternate timeline Kerrigan takes control of the hybrid program and becomes 10x more powerful than she ever was. Then there is an epic battle between Duran/Kerrigan. And the Dominion and the Protoss are in the middle of it. Let the final battle be against Kerrigan as it should have been...or maybe the Overmind gets resurrected and becomes the new big bad as he was in SC1. Lots and lots of options!
But to be careful....I wouldn't carbon copy SC2 without reason to. And I wouldn't dismiss established canon lore for no reason. There should be a loophole somewhere that makes you create alternate history. Messing with time always gets people away with that :)