Alright, so a friend of mine works the stage crew at gamescom every year and always sees some interesting stuff. He told me before the announcement that they had the computers set up behind the stage that they showed the presentation on and all the clips that were shown separately through out the event. He was texting me the whole time freaking out about all the stuff before it even happened but he said there was also a few clips they had there that weren't shown, as a part of a package that seems like it will be released later or maybe at Blizzcon.
One of them was the cutscenes at the Tomb of Sargeras where the heroes fight - apparently intended as the 7.0 pre-patch.
he sent me this one on his phone, so not the best quality obviously but they were right... it is very surprising.
What it shows APPEARS to be Tirion Fordring fighting a large force of demons and eventually being overwhelmed. It does appear as if he is killed but obviously can't be 100 percent sure since its pretty low quality and very short. We also see the player character obtain the weapon as he falls, and then turns the tide of the battle forcing Guldan and the demons to retreat from their position.
This makes a lot of sense honestly, especially considering we are meant to suddenly become the head of the Silver Hand v2.
Let me know what you guys think.