I’m seeing it again today, and in the meantime I’m watching TFA. Han’s “Yeah, I knew him . . . I knew Luke,” line takes on a completely different vibe now.
Also, if Kylo was still rocking a blue saber and didn’t have the mask yet when he destroyed Luke’s academy, then what the hell is the the scene with the Knights of Ren in the rain from Rey’s TFA Force vision? Are they just substituting the version of Kylo that Rey (and the viewer) is familiar with, or is that something else entirely?