Is the Trogoldon going to make it into the game? Any pictures?
So far sadly none, but hopefully they simply haven't given out everything yet. They have really just shown what's in the trailer, the bastiladon, Stegadon, terradons and cold ones. I believe that's it so far, maybe they showed a quick picture of rippers, but I'm not sure, I'll have to rewatch that particular video again.
I could imagine that they would bring in the Trogolodon, if not for any other reason then that they could make it a bit more interesting to field, than it ever was in table top. I understand that they really like the challenge the lizardmen brings, so I wouldn't be suprised if we would get pretty much every beasts in the armybook, minus some variation, perhaps.
Even if the trog, or ark isn't in the core game, they might still come as DLC, as I already mentioned

Since they are starting to run dry in armies to add for DLC it makes since to do more army centric DLC, like Rise of Sotek or similar named DLC. (Should they add a core army from GW, beside the four mentioned, that would leave only three for next game, provided they don't regard DoW as such an army)