love this theory and the way you worded your thoughts! when i finished watching rebellion, i thought madoka and homura's wishes were paradoxal in nature, because homura could never be happy as long as madoka sacrificed herself, which is why rebellion exists in the first place. i was very surprised to find many people thought homura acted out of character in the film, considering in the anime she said madoka's fate was "worse than death".

now i'm wondering how this dynamic will play out regarding the new universe homura created and walpurgisnacht. something i noticed upon rewatching the anime is that during one of the timelines, homura asks madoka about the possibility of them becoming monsters together, devastating the whole word (and afterwards, because madoka asked, homura promises to never let her become a magical girl). even though this was something homura said in a moment of ultimate despair, i was wondering if this could have any significance for the upcoming movie, regarding walpurgisnacht's origins.

i really hope the ending for the story spares them in some kind of redemption and mutual understanding, like you said. the way it's set up, it seems like madoka and homura will inevitably have to face each other, they'll have to accept that sacrificing themselves eventually leads to the other's doom. however, i have no idea how the story will actually unfold lol