OKay, let us speculate. We saw in the video someone blasting Moenbryda to thr ground. We also saw the same figure as a normal player character fighting in the World of Darkness, so it looks likely that the Scions will indeed be betrayed and by us no less. Nabriales also makes his move and kindaps Minfilia. We saw Yugiri without her hood, so it is safe to assume that she will indeed be unmasked.
I don't see Ilberd being a red mage. In fact I don't really see anyone being a red mage since they are not confirmed to be in development.

As for the "real Enkidu" he is dead. He died just a bit before we get to see Gilgamesh in Type-0. I'm guessing all the Enkidus we saw in other games are just different creatures he calls Enkidu. This is why he is sometimes a dog, sometimes a winged monster and sometimes a person. It may be that this Enkidu is the real XIV Enkidu, but still he isn't anymore real than the green chicken.