It’s all about the dyad…
Seriously though, that link with Ben is enough.
Early rumors suggested that this film would be about Rey training two new pupils, a boy and a girl, and that the movie was pitched as “Your Name in space.” Those things lead me to believe that the film itself will be about Rey finding two new “heirs” of the dyad, so to speak. The fact that it was originally supposed to be set much later in the timeline kinda adds to this theory, imo.