Well the red eyed Tsukune in the ending can signify that he(Vamp mode) could be in the anime. Since he's in full control. Also in the first season hinted that when Gin-werewolf, Neko-sensei as we see in the latest ep, Kou looking vicious and Tsukune with a different aura in the end theme.
Though here in this latest episode will either give us 2 things. A different ending or
something like that...
I guess we need another season to see the mysterious 2 eleder sisters shown in Capu2.