It’s going to take some time to dissect this movie and explain what I think happened.
*spoilers* ^-o Think I can answer a few common questions:
Why is everyone alive and going to school?
answer: It’s a dream on the inside and Madoka’s new world on the outside.
Why did Homura split madoka?
answer: So she could finally have her wish granted and save madoka from being abused by the incubators.
Whats’s with that odd looking black soul gem?
answer: The two souls of Homura and Madoka are atonally fused together living within a nightmare until the end of time.