While playing Titanfall, we've seen Angel City as a frontier city with martial law forced upon it by the IMC. Angel City was divided into small districts with great walls in order to maintain the resistance. Since Angel City once again appears in Titanfall 2, we assume that the act of liberation of the city was not successful.
So, Angel City DLC will be free for everybody who owns Titanfall 2. But if you like a three-day headstart, you can go ahead and pre-order Titanfall 2 as well. Pre-orderers will also get the exclusive Nitro Scorch pack that includes a special Warpaint as well as a unique callsign.
Respawn has made it clear that all of the DLC packs for Titanfall 2 will be free since they don't want us to worry about who has the map or not and play together as a community.
Titanfall 2 will hit PC, PlayStation 4 and Xbox One on October 28.