Chris Colfer is campaigning madly for one storyline in particular. It involves Blaine. It is rumoured that this storyline involves Kurt having sex with Blaine for the first time.
The Kurt storyline which Chris Colfer is campaigning for does not involve Kurt and Blaine having sex. Chris said about what he is campaigning for: "It's something that happens in high school every day that glee has not covered yet".
Ryan Murphy has confirmed that Santana's sexuality will be handled differently from Kurt's. The first difference relating to how accepting Burt was of Kurt. It can be assumed that this means Santana's parents won't accept her being a Lesbian.
Blaine will be transfering to McKinley high. Kurt spends most of the season premiere trying to get him to transfer.