Cool map, but I got a few observations:
* In the first enemy base with the Keeper of the Grove hero I killed all Night elf bases but not the Corrupted ancient cuse he was helping me and wanted to keep him in case more enemy forces came, so the cinematic of the Keeper making the Tree barrier never came, I just realised something was off after I killed the Troll Lord and got his eye what triggered the quest to get the itens to make the Arch Infernal, so I killed the Corrupted Ancient and everything went on as usual.
* Also one personal touch wich was personally bothersome was that you missed a vital part of the corruption of Felwood: The Skull of Gul'Dan. I was hoping I would use it to turn a big chunk of the forest as Tichodrius did in the Campaign, and what pretty much made Illidan intu a Demon, so adding it in later version might be nice, perhaps as an optional quest to weaken the last boss even further or something like it, would have to beef up the boss tho.
That is it, love single player maps with good story behind it, well done mate, very nice job here!
Edit: Forgot to say that after you finish the Infernal escort mission the corrupt trees item vanished from my inventory, wich was a letdown, for it was a cool aspect of the game, and necromancers are very useless in that mission, Nerubians are so much more effective.