Originally Posted by
Ryllharu
Uhh...it absolutely does have many of the same elements in its setting.
Slaine = Suzaku
Cold and calculating protagonist (too soon to say) = cold and calculating protagonist who gets emotional
Princess = Euphemia (and probably CC as well)
Scheming corrupt nobles = scheming corrupt nobles
Martians = Brittania (and their corresponding overwhelming power by comparison)
Earth = Area 11
Cruhteo = [redacted!] (converting him to their side is the endgame, doesn't look like he's in on the conspiracy)
etc.
The general political setting shares the same with basically every Gundam series ever, which Geass copied as well. That's why I said Gundam/Geass.