Okay Warnicro,about the intro i tell you my storyline.
-After a long tries Kil´Jaeden gaves Gul'dan another chance to destroy the Lich-King and makes a ritual for reviving his body.They offer souls of then strange orc warriors(I had the idea to make skulls on the ground and over it are flying the souls of the ten orc warriors,and the orc warriors must be transparent)The ritual are making two nomral orc wichmasters,as the witchmaster see that two souls from the twelve souls were missing,Kil´Jaeden kills the both witchmasters and offer their souls in the ritual,Then Kil´Jaeden offers all the twelve souls and revives Gul'dan.But Gul'dan could be revived once as a Ghost.Now Gul'dan must find his body.But this is a long travel.While this travel(I think this would be the first map)he takes in the cinematic the body of a
Druid(the one who can transform himself in a bear) and he finds the Druid in Ashenvale,then he makes a ritual and opens a portal with a new artefact Kil´Jaeden gave him to summon demons that can help him.He goes in the portal and goes to another demension where all the lands are destroyed.He sees
the three demons(Esjela,Infeston and Infernon and other demons) and walks to them to ask them to follow him on his journey,Infeston don't thinks that there is a reason to follow Gul'dan and Gul'dan promises that they can have the mighty artefact of Kil´Jaeden with that he can open portals to another demension(Oh at this moment I see a new job for HardgamerDZ, he can make me an Item with that you can summon a felhound,but it has a long decay time,and the felhound is for 80 seconds there,but you can use it so often you wish),but this was a lie,The Demons didn't know it and follow him through the portal.
And they are landing to the 2nd map you are making,I mean the cinematic ends when the move into the portal.
That was all! ^^