Friend 1: WHO WOULDN'T TAKE SIF OVER FREAKIN' JANE!? Seriously? Can't someone just kill Jane? I know that's not currently canon either, but can't a house fall on her or something? Sif could drop it there: "Oops. I thought Midgard houses went on top of people."
Friend 2: it could be recompense for Jane hitting Thor with a car repeatedly...how to get a man by Jane Foster: hit him with a car until he falls in love with you
Friend 1: Well...it worked. Except that car-induced love cannot last. Add that to life lessons I've learned from Marvel movies. It can go right after "Near-death experiences make your hair look fantastic," "Money is totally a superpower," and "If you're attractive enough, even threats and insults can be construed as sexual invitations."
Breaking news: It was just announced on the Walt Disney Investors Conference Call that Joss Whedon will return for The Avengers sequel. Whedon is signed to both write and direct the upcoming sequel. Disney confirmed that Whedon is also involved in the development of the long-lead ABC live-action television series which will be set inside the Marvel cinematic universe. More info as we get it.