Team Dark may have been a consistent team for years in both the games and Archie comics, but they no longer exist as anything but an out-of-unverse brand, according to IDW Sonic and Sonic Frontiers writer Ian Flynn. When a fan asked Flynn on his podcast what kind of base Team Dark would have, Flynn answered they wouldn’t have a base, because SEGA does not consider them a team.
“Team Dark isn’t a thing. It’s an out-of-universe brand, apparently. They are not a unit, they are not even friends,” Flynn said, “They don’t do mission things together unless the story has them doing it.” He want on to state his belief that Team Dark makes the most sense out of all of the teams (aside from the Chaotix), and that he doesn’t like this.
You can find the answer on his latest podcast, embedded below. The answer starts at 10:20.