What surprise! I think this is the most interesting Starcraft map I've seen until now (and that includes my own map). I'm looking forward to this.
Quick comments: I like the Medic, Zealot, High Templar and Hydralisk. I think the Dark Templar would make a great future Protoss hero. However, I'd prefer to play as an Ultralisk rather than a Zergling. How about making the Ghost female and using Nova's model? If you keep the ghost as a male, you could make a quest that transforms the Ghost into a Spectre.
I'm not sure but I think Blizzard doesn't allow custom maps to have the word "Starcraft" in them. I could be wrong though.
Personally, I think the RPG camera is not good. The fog of war is too... uh... heavy. You can't see far with the RPG camera. It's a great idea on paper, but the engine appears to prevent it from working nicely. I think it would work much better in indoor maps. Also, I'd like to recommend that you make the game easy to play, so not too many complex mechanics. Smart casting is an excellent idea! I gotta remember that if I ever make an action RPG. Have you ever thought of making the units attack and move Diablo-style? I.e., you must hold the left click button over the enemy to make the unit attack. Or, you must hold left click to make the unit run in that direction.
I got a lot of respect for you Arcade. You made the Metal Slug map, and that looked really good. But this idea is on the next level. It looks very professional too. Please keep up the great work.