No. Only those under Mozar's command are dead. I suspect the rest as well their Prime Leader are still alive and will show up and take revenge on the Turtles for ruining their attempt to destroy the Kraang and the Earth.
You might have a point since Zanmoran is still out there. With the loss of Mozar, Zog, and the Heart of Darkness, Zanmoran will not be pleased. We haven't even seen this show's version of the Galactic Federation yet as they are the known enemies of the Triceratons.