His army has been slaughtered, his dreams of conquest crushed, and the Purge are no doubt on his ass. Quite probably, he's going to try to keep the small group of Oldbloods he had gathered together. meet with them, make some speeches, prepare for the next assault. Maybe he'll be forced to deal with SOLDIER, or to contract with human weapon suppliers. Giving all his vampires machine guns would be highly effective against the Purge, at least.