While we don't yet know about Linux support, I will honestly be shocked if Feral Interactive didn't port Life is Strange 2. Especially since they ported the original to Linux and are currently porting Before the Storm which is a little delayed.

Here's the setup:

The main characters of Life is Strange 2 are brothers Sean (16) and Daniel Diaz (9), two brothers living a fairly normal life in Seattle, Washington state. Following a tragic event, their lives are forever changed. Now on the run from the police and threatened with both separation and incarceration, Sean decides to take his younger brother and seek a better life in their family’s home town of Puerto Lobos, Mexico.

And the new trailer:

As they previously teased, there is a new power although they're not revealing how it relates to the two brothers yet. As for some proper gameplay, they said another video will be released in a few days.

Episode 1 (there will be 5 in total) of Life is Strange 2 will release September 27, 2018 so we've probably got quite a while to wait on it before it comes to Linux.

See more on their official blog post.