As you all know, the times between major updates have been almost nothing but cosmetic promos. Heck, almost the entire year of 2014 was nothing but that (except the first set of Vanguard missions. Hence "almost").

But I think there's a deeper meaning to all this.

Before I continue, I would like to admit that I don't know if it's safe to talk about the intentions of the small band we know as our developers and GMs. I'll say right now that what's ahead DOES NOT involve spoilers of any kind, however, this is merely speculation and theorizing. no file-diving is involved. This hypothesis is based solely upon anecdotal correlations in missions and the game's main lore. If they do find offense, I will edit this out completely and send it straight to the Graveyard without a second though.

SK is very story-driven. We escaped from the Morai, in hopes of finding an energy source to rejuvenate our home planet, ended up crashing on Cradle, sought to open the core for its energy to repair the Skylark, only to find out there's an entirely new world inside it along with the Swarm ready to eat it up from the inside-out.

SK has been around for 4 years, starting in 2011. The only story we had was crash, hope to open core, that's it. And we've been given a lot more depth since then.

And that's just it. With Dreams and Nightmares implying for a final showdown with that swarm-core-eyeball-vortex-thing, it's obvious there's going to be a "final update" at some point during SK's lifetime, this could include the "final boss" (whatever that may be).

As a result, these box promos are simply to give us something to look forward to as more story is being brought out. To simply fill in the void in the holes that are the time periods between major lore updates, to make the ending of the game as climactic as possible for old veterans and newcomers alike. Most see this as more harm that good, but you have to ask yourself; "...Is it better than nothing?".