Digital Eclipse wrote a quick FAQ on their website: https://www.digitaleclipse.com/media/digital-eclipse-atari

Most important (I think):

Is Digital Eclipse only allowed to work on Atari properties now?‍

It is business as usual at Digital Eclipse! While we’re certainly happy to have greater access to Atari’s fantastic library, we still have the freedom to seek out projects with other parties. In addition to recent releases like Wizardry: Proving Grounds of the Mad Overlord and The Making of Karateka, Digital Eclipse has a lot of unannounced projects in the works that do not involve Atari’s IP, and those will carry on as planned. The future is wide open, and we believe partnering with Atari will bring about even more opportunities.