With the dissenting opinion as his basis, Judge Sullivan will likely seek an en banc consideration in the Court of Appeals.
In addition, with seven judges on the DC Circuit appointed by Democrats to four appointed by Republicans, there is always the chance that an en banc partisan lineup may come to the rescue of Judge Sullivan. Indeed, to a greater degree than is commonly realized -- even by lawyers -- judges these days tend to have an avid interest in politics and make it a frequent subject of discussion among them. The exceptions tend to be conservatives with a strict moral view of their judicial role.
Finally, as in baseball, by watching the players one can learn a lot as to what is going on in the game. Flynn and his lawyer have been circumspect in their comments about the case. Even in winning an important victory, they are not acting like they have won the game yet.