2K sent out a press release today confirming a number of things including a new Civilization game is on the way.
In the press release they noted that Jake Solomon, Creative Director on XCOM and Marvel's Midnight Suns, is leaving after two decades at the company after being a big part of XCOM: Enemy Unknown, XCOM 2, and Marvel's Midnight Suns. Not only that, industry veteran Heather Hazen has been bumped up from Firaxis Games Chief Operating Officer to Studio Head. Hazen previously worked as Executive Producer on Fortnite at Epic Games, as well as Plants vs. Zombies and Bejeweled while at PopCap Games.
Not much was said about the new Civilization apart from Hazen's own statement in the press release:
"I'm thrilled to have this opportunity to carry on the studio's storied legacy, beginning with the announcement that Firaxis is in development on the next iteration of the legendary Civilization franchise," said Hazen. "I'm lucky to be working with some of the best developers in our industry, and we have plans to take the Civilization franchise to exciting new heights for our millions of players around the world. In addition, we will continue to support Marvel's Midnight Suns with post-launch content, and explore new creative projects for our teams."
It's probably quite unlikely that the new Civilization will have Native Linux support, given that Aspyr Media aren't really doing any more porting like it. With Steam Play Proton as good as it is now, no doubt by the time it releases it would work quite well anyway on Linux.