You might have seen the Horde Intro szenario from some Alpha players already. I decided to screenshot the story/dialogue bits from the video for players who missed some of the important parts or want to look for specific information.
https://imgur.com/a/OSYna
((with the chrome browser addon: "Hower Zoom+" you can just mouseover the link and scroll through the pictures with your mousewheel))
Source for the pictures:
Nobbel's youtube video
Some of the more interesting szenes for me:
-) The mission is not to rescue Saurfang. Sylvanas probably thought he was dead.
-) Allied races participate as well.
-) Nathanos doesn't enter the stockades, he stays behind to cover the escape.
-) Saurfang distracts the SW guards so that the group can free the other prisoners.
-) There are many placeholders for cinematics, so important information might be kept a secret still.
-) Zul still has a placeholder model in the Alpha.
-) Everyone uses some power to help in the escape.
-) We're only worth 50 gold pieces to the Alliance.
-) Still important enough that Anduin himself joines the search.
-) Thalyssras shield repels angry Worgen.
-) "They were waiting for us. We were compromised"... What??
-) Jaina loved the "escape from the Lich King" dungeon as well.
-) Genn is afraid of fire.
-) Alliance forces have returned from Lordaeron.
-) Beware the mighty Gnomish Gyro Engineer.
-) Jaina chooses Stormwind before revenge.
I hope you like it. Let me know what you think about specific szenes