Those 4 clips are definitely Expansion Pack content. The first I agree is most likely Earth, and not Old Russia. Looks like it is likely a PVP map by the layout, and that architecture, the large building and the church in the background seem European in style, so I'm thinking a PVP map set in the European Dead Zone. The second small clip is PVP and the orange lighting emanating from the huge Red Planet in the background makes it clear that this is Phobos or Deimos, Mars' moons. I wouldn't know any way to discern which as I don't know much about them. The third, with the big rib cage could be deeper in the Hive lair although I'm not sure, and as it's underground in a cave-like area, it's hard to take anything from the environment that suggests any particular planet or moon. The fourth, where the fireteam is moving toward that pillar of light or something, it's again hard to take anything from it, but from what we've seen of Mars the architecture seems similar in style. Although the platform they're on and the rings around the pillar are very similar to the Vault of Glass. Could be something to do with Charlemagne on Mars. The next raid maybe? That's what I could glean from pausing the video on each of those clips. Only things we can confirm are that each expansion gives us at least 1 element from all game modes available in Destiny, along with more gear etc. So some PVP maps from new areas, including what looks like The European Dead Zone and either Phobos or Deimos. At least 1 strike. More story missions and likely a new exploration/patrol area. It's a sure thing that means we get a new destination to explore. So a new location on a planet/moon, or a new planet/moon altogether. The hype train rolls on.