Had them in MoP. No, they aren't. Unless they add something in a patch that just so happens to be near one of the dungeons, it won really be that interesting. Probably more of a PR move if anything since I doubt most people would care. Now, if it was a mass summon to said dungeon, then maybe since the one who got it obviously runs mythics a lot and being able to summon others with just them would be useful.