Hey I don't want to be bossy but you need to improve the description. Add screenshots and tell us a bit more about gamplay and the story. Like who are the heroes?when did the nightmare start?what kind of nightmare is it?
Ill test it after the changes are made
Edit

k I tried it anyway
-replace the boundries(the black)with trees
-i can't train heroes,you should put the taverns close to each other and put a player owened circle of power in the middle
-you should add more doodads
-the terrain is too flat,use the raise,lower and smooth in the WE
-add undead to the Fallenland side
-make a nightmare lord boss
-why is the secret heroes player owned in the first game already?
-make spirt towers stronger
-add humans and night elves to dreamland base
-make the waves start right after the diffyculy is chosen
-dont make the pitlord go in the first wave,make him go later
Suggestions:
-remove some custom muisic to decrease filesize
-use this icon for the worgen
http://www.hiveworkshop.com/forums/icons-541/btnworgenhero-199937/
-add hero to dreamland waves too
-go take a look at the hive's tutorials
-add creeps
-add credits too your description
This map has a lot of problems but if their fixed map can be approved. 1/5 for now