1. the portal is based on the other planet, remember that medivh contacted guldan and told him how to make the portal, why the portal to azeroth has the dragon and looks that way, well the portal to draenor has a snake, azeroth dragon, draenor snake.
2.you dont know how vast the wow universe is, NONE OF US DO and you cant use the excuse "well anything could exist" because that is a stupid excuse and goes against all logic.
yes i can tell you why there is a dragon skull CARVED into the portal, because the portal needed to be very speicific in shape and medivh told them how to build it, then come WoD garrosh told them how to make it, notice how the portal is the same both times in allmost every way (other then size)
3. i am not frothing at my mouth, stop trying to shut down my arguments by going "oh hes just a rager, therefore his opinion is invalid" how about i do the same "obviously you are a furry and just want your dragons everywhere, its obvious with your obession of dragons and avatar, pull your pants up and think logically"
4. again the argument "anything could exist" is stupid and should not be used, allmost sound liek a religous nutt, LOGIC would have you argue what exists is something we should go by, not stuff that could possibly exist in the universe ABOVE stuff we know exists
i mean the flying spaghetti monster COULD exist, so boycotting the eating of spaghetti is logical then right?
5. no i know we havent seen all the demons, that pretty fucking obvious, but what else is pretty obvious is that dragons are unique to azeroth it seems, we have yet to see them ANYWHERE ELSE and the burning legion seemed quite interested in them when they found them on azeroth.
the fel corrupted dragon is an azeroth dragon corrupted by fel
the burning legion does not have armies of fel corrupted dragons from other planets, because as we know for now, again anything could change ever, but saying "all things could exist because of that" is stupid. by your logic we should assume that the reason paladins gain wings is because sargeras was secretly an angel and is the mother of the holy light and well that makes sense therefore it should be catered to ingame.
the burning legion does not have armies of fel dragons, nor would they have when "chaos bolt" was learned
6. shadowfury, again do you have proof? cause i can go all the way back to when it was added in TBC and no, it never said "summons a demon"
you have horrible logic
"it could exist possibly, so that means it must exist"
and
"I will say your wrong, but then show no proof that if i was right, would be easy to prove"