Board Thread:General Discussion/@comment-34147304-20180131010421/@comment-34260455-20180131013402

It's implied when Azmuth said he had a safe place to send the Sentient Ultimates he was talking about Primus, since there weren't too many other places he could've sent them. I suppose they might've been sent somewhere else, but it's a pretty fair assumption that Azmuth sent them to Primus.

Since Eunice still exists after So Long and Thanks for All the Smoothies, and she lived on Primus, the Sentient Ultimates might still exist. They've never appeared outside of their debut episode though, so it's difficult to say.