Is this game region locked for online play? I have a few friends in Australia that are getting the game and I’m in the U.S. I’d like to know that we’ll be able to play together before i pre-order a copy for myself. Thanks in advance.
The multiplayer connectivity is P2P so provided you have a good (low latency) connection to your friends it should work. 
The connections are mediated by platform (i.e. Steamworks, PSN, XBL etc), unfortunately cross-platform play is not supported. 
[Accurate to the best of my knowledge at this time]
Thankyou for replying. I should have been clearer with my question as it pertained to the ps4 version but you answered the question regardless lol but thank you, we’ll all be picking up a copy