“The Cage” only aired because of the writer’s strike at the time, and “The Menagerie” episodes recuts to the ending of “The Cage” into the ending to be completely different, which is then reinforced by Vina’s appearance in “If Memory Serves”. Personally, I think the only things that are canon in “The Cage” are the scenes we see in “The Menagerie” two parter. Which, to be fair, is most of it.