JUST TAKE ALL MY TEARS DAMMIT
Eh, not like they actually ended up parting
That's true... Sayaka understandably believes they will though. Do we have any canon confirmation that these two still live together when Homura reshapes the world?
This is an Urobuchi and Akiyuki work, and one of their most thorough and brilliant ones at that, so about 85% of the "canon" at the end of Rebellion is what we call 'subtext' in this community. AKA, you have to interpret, analyze, and read between the lines.
However, to answer your question, we sorta do. Kyouko's hard past is not going to suddenly not happen, poor girl. And they remain the closest together in Homucifer's most recent timeline, so it'd only make sense.
also anything can happen in the 4th movie.
Eh, there's gonna be a 4th movie? I thought the announcement for "Atonement" was just a (well-orchestrated..) April Fool's joke?
We have no confirmed continuation to the series, but if Urobuchi and Akiyuki's krew at Shaft butted heads about one, it'd be amazing and make sense. There's enough possible material for a true finale, as well as the fanhood and financial support to convince management it'd be a smart decision. Shaft hasn't announced their next project after Nisekoi:, so who knows what they'll be doing next.
But if they don't ever continue it, that'd be fine and okay as well. If they do continue it, we can expect a lot more yuri canonization if anything, because Shaft has proved on multiple occasions that they're on our side (Negima, Hanamonogatari, Sasami@, Koufuku Graffiti).