They could call it Act 0 and make it have 2 chapters or something.
4 player co op as well. Host is Prescott and other 3 players are Onyx guards that can be named if they wanted too.
The start of the chapter could be Prescott arriving with his secret army or body guards at Azura meeting all the scientists and leaders. Adam Fenix explains more things that didnt get talked about in retail campaign. Such as Queen Myrahs origins, Azura, the lambent. Because remember Prescott didnt build Azura, the leaders before him did.
After custscenes and talking, the Queen and her forces assault and capture Azura after following Prescott. Prescott and his troops try to evacuate everyone but fail and Adam tells Prescott he knows the Queen will spare him. Prescott and his boys evacuate as many people as they can with 10 or so choppers so that they can give this intel to Hoffman and Marcus. The Queen and her troops follow them and all the choppers have to split up, get destroyed or help repel the Queens forces by air. Heck you could even let us pilot a King Raven for a change instead of having a shooting gallery mission. This will be chapter 2 after chapter 1s Azura level. The finale having Prescott land his chopper on Ravens Nest.
So what do you guys think? Pretty cool eh?