As much as I wish that would be the ending I just can't see it happening. The setup for Starco is just so blatant it hurts. I would even prefer Jackie winning the Marcobowl but it just won't happen. They are gonna pull the traditional: >Jackie I like Star>Aww... oh well that's ok Marco I am a super chill person and I won't let it bug me. She's a lucky girl.>Stuff happens to save Star.>Starco end.
I say this, but there is a 4th season now which brings into play a lot more. They could end S3 with them together and make it like Kim Possible and Ron. But they could just flip the table and say fuck it they are just friends, Jackie wins. OR they could shoot a ball out of left field and just burn the table and say Janna wins. https://www.youtube.com/watch?v=qxffh_JFe1Q
Star = Extension cord.
Jackie = plywood.
Heckapoop = patio set. Janna = mother fucking drop cloth