I pretty excited to see if they do implement what we saw in the trailer (I KNOW THE TRAILER IS NOT A REFLECTION OF THE GAME PLAY) but if the dungeons in Cyrodiil actually have multiple entrances then you could essentially use them to move your army undetected from above and surprise the opposition by popping out closer to the keep. This would be really cool and would add so much more to think about when defending a keep, you have Farms to protect, dungeon exits to guard, Keeps to fortify so much to do requiring so much communication to pull of properly! This would also make dungeons in Cyrodiil a dangerous place to camp ... but thats what a PVP zone is all about!

I am getting very excited now lol

Any thoughts, hopes or issues you see?

By this i do not mean you pop up inside the walls of the keep as shown in the trailer but you may pop up in an area which greatly improves your position in cyrodiil and brings you closer to the enemy keep.

I hope so, that'd be an awesome idea.