[Archon_Wing]

Kyosaya only makes sense in the movie, as series Sayaka was already declining into a witch and had no chance to reciprocate. It is entirely possible it was one sided from Kyoko to Sayaka, since Kyoko really felt bad for her, started to slowly relate to the situation and did not want Sayaka to die alone.

On the other hand, the movie has Sayaka retaining her knowledge of past events, so now she has a chance to go over her feelings. Personally, I think this possible pairing was presented better than the other one.