- Glimmer goes with She-Ra. Her father, King Micah, was a prisoner on Horde World and left Etheria (once he freed himself) to stop the Horde. Glimmer would want to see her father again, and this could be her chance!
- Sweet Bee is FROM space and I'm sure she would come in very handy. She's traveled all over the galaxy, looking for a new home that's suitable for her Hive. She probably has come across Primus before.
- Star Sisters - they came to Etheria via a meteor and, like Sweet Bee, are from space. Their powers and knowledge of what lies beyond Eternia/Etheria could prove very useful.
- Roboto - He-Man needs a robot. Robot's don't need to breathe in space. Great for repairs if anything happens to Starship Eternia.
- Sy-Klone - He has built-in, space radar!
- Faker - Skeletor could use this non-breathing lackey for ship repairs too...and if he needs a He-Man doppelganger...he's got one!
- Tri-Klops - Skeletor's inventor. He'd come in very handy.
People who AREN'T going:
Frosta - has a kingdom to run.
Castaspella - same.
Evil-Lyn - sees the opportunity to take over Eternia while Skeletor and the Horde are preoccupied.
Teela - Captain of the Royal Guard and is the new Sorceress.
King Randor and Queen Marlena - Rulers of Eternia, plus we know they stayed via the bios.