Suicide Squad will require an internet connection even in single player mode

According to the Suicide Squad FAQ, it will require a connection to

Always connected to the Internet, even if you are playing a single player game:

“Yes, an Internet connection is required to play Suicide Squad: Kill the Justice League solo or through online co-op.”.

The exact reasons for the need for permanentNetwork connections are not known, but there are rumors that it has something to do with the game's cooperative mode. This also means that if the game's servers are shut down by the developers in the future, players will no longer be able to play the game even on physical media.

Most game developers usea one-time DRM verification system, which is much more convenient, since an Internet connection is needed only once, and then users can play games offline.