Re: The Jaimie Alexander/Lady Sif thread
Thor 4 will be Hemsworth's 7th Thor, I think he'd be tired of the character by then. I know Natalie will bolt. It would cost too much for Marvel to bring everyone back. They will recast along with Iron-Man. I don't see a Thor 4 happening, without a soft reboot.
Sif/Thor in Thor 3 is implausible, there is no interest on Thor's part and the so called "love-triangle" was completely shelved. Marvel isn't interested in Sif/Thor that's why they minimized their screen time together, they didn't even show Thor say goodbye to her when he left for Earth to emphasize that she's just one of the guys along like Hogun and Volstagg to Thor. Thor/Jane on the other hand is the most developed and spotlighted romantic relationship in the MCU, they aren't going to dump it at the last minute.
Heck the only plausible "love-triangle" in the series is Jane/Thor/Richard LMAO!