3.
This page suggests otherwise.

I think it's just the fact that it's based off the sets so much, they couldn't take him out fully...
5. But they're both Glatorian. Unlike the Toa comparison.

Legends is just the sub-name to differentiate it from the winter sets, probably as a movie Tie in.
*Other post* Bone Hunters are separate from the Skrall, and only teamed up because of the Traitor, whoever he is.
Also, please don't double post.

Okay, I just saw what you mean, but I think that's supposed to be the Skopio's neck...
*At edit* *Points to first link* They ran into the actual creature that Telluris based the Skopio off of. They used parts of Telluris for Creature Skopio because it was easier than making a new design when that could've been what it was.