According to an interview with Turtle Rock Studios’ Creative Director Phil Robb, all DLC maps for Evolve will be available to players for free.
Robb went on to say Turtle Rock didn’t believe in segregating the community,
First thing we said was we can’t break the community up, so all of our maps will be free. We never want anyone to get booted off of a server because they haven’t bought something.
The first DLC will usher in new monsters and hunters, and for those who haven’t purchased that DLC will still be able to play alongside those who did; the only difference is that players won’t be able to play with those characters.
We’ll have characters and monsters, and even if you don’t buy them, if your buddy wants to buy the DLC, that’s cool, and your game will be enhanced through his purchase. So, you won’t be able to play as those characters, but you will certainly be able to play with those characters.
Evolve will release on February 10th for PlayStation 4, PC and Xbox One.