This is a rumor thread. There is no actual confirmation on it besides someone possibly making false leaks.
But someone has given a rumor that they have leaked a datamine of quest log that the class Etoile (in JP) will be called Superstar in NA. I personally felt that Scion is a cool name for Successor, but if Etoile does change into Superstar, that's pretty big 2020 Anime betrayal since it'd be SEA's Force turning into Wizard.
Following is rumored log: """un_063020_0160#0 "Oh, you're curious about the Superstar? I'm<br>honored that a Guardian would show such interest." un_063020_0170#0 "Very well, then! Allow me to explain." un_063020_0180#0 "The Superstar is a new class that specializes in<br>melee combat."""
Considering how Road map only revealed up to Phantom, so I am quite convinced on how Etoile might actually get called Superstar (with all flashy star looking moves)