Wow, I only knew Jewish Preexistence from...Jewish Preexistence, Jewish Encyclopedia. I was speculating that the "glory" was...the power and wherewithal in Jn 17...to withstand the Cross. Here you are giving another option, that the "glory" is...something that is a source of great pride or...poignant high regard.
Or maybe both meanings could be true? In any case, two notable references which buttress a NON-physical preexistence of the Temple and Jesus, in-line with other things God plans...from the foundation of the world. And all who are written in the Book of Life are considered, with my reference, as being preexistent too.