Mara Jade* is still in my headcanon unless a future movie reveals a character (like Rey) is the daughter of Luke and Not-Mara-Jade.

Anyway, I don’t care about whether they bring back old Legends stuff. The mental-gymnastics I perform to maintain my own canon are actually kinda fun.

*I’ve not read any material with her outside the original Thrawn Trilogy, which is still mostly in my headcanon aside from the Solo twins. A lot can happen between the time of those books and TFA, including death or disappearance.