So with this in mind, it could be safe to say that it isn't their physical bodies that go to the red star.
This makes sense -- unless it only worked for bodies that living characters lose track of, like Mavrah. It's interesting that the only example we have backs up that idea.

But then, Greg connecting this (apparently this anyways) beforehand to Jaller does dash that to pieces, I'm just not quite sure how lol.
I was thinking, you know how masks can be teleported, since 2001, easily with Suva. Maybe it's only masks, and it simply uses Suva teleportation. Then, connecting to the massive power source of the RS to revive them.
This would 1) leave corpses, 2) explain how the To teleportation works while the From failed (easier to teleport a mask by Suva system than a being by some other system), and 3) not be just a spirit being teleported;
something physical would go.
Of course, it would rule out Skakdi and the like, so yeah, I dunno.
This would fit with Greg's statements that Teridax won't be returning, but it is unfortunate for other characters like Krika who we might have wanted to see more of. The problem is that for a (post-evolution) Makuta to die, their antidermis needs to be dispersed or destroyed.
Well I'm still not convinced Krika is out. His existing body faded from existance. But what if prior to that it, or just his mask, was teleported (still fading from existence) to the RS, and his consciousness transferred?
Unlike Teridax, he still had a mask and his antidermis wasn't dispersed or immediately destroyed.
I don't see why people expect characters like Matoro or the Makuta to be revived. The operative word here is that the Red Star is teleportation device. If there's nothing to retrieve, nothing will be transported. There's nothing left of Matoro and friends, so they're gone.
I think I agree with this, but then that 777 stairs thing gets me wondering... Maybe, as an act of mercy, the GBs put that there, since they knew the guy who would have to do this, nanotech or not, would have to die, as a backup system. Maybe his consciousness up until that point was backed up, connected, etc.
Of course it already had an apparent in-story explanation (a test), but then if the kind of thing I'm suggesting was the case, it would need a cover story. Plus it would still serve the purpose of a test; this wouldn't change that. Just add to it.
If so, then the Matoro on the RS might not remember anything after that point.

I dunno...
[Edit: You know, besides the mercy angle, thinking like a GB, a guy who's willing to sacrifice his own life would definitely be a valuable "unit" to back up. More I think about it, more I'm wondering if Matoro MIGHT be there!]
It's all trying hard at the sci-fi angle--these are nanotech beings, their data is retrieved from a body and transplanted to a new one. It's not going to magically gather the "spirit" of characters out of thin air to recreate them.
If you're referring to me, not really trying hard. Just relaxing and enjoying imagination.

That's what LEGO's all about, yeah? It's fun.

And whether you like this twist or not, ya gotta admit, it definitely provides food for the imagination and analysis.

And this is a story filled with "magic" powers, all of which Greg defined as sci-fi-not-understood -- why not?