Season 7 we will be introduced to tech savvy villain EP Stephen Nathan describes this new villain as “someone who is an extremely odd and fearless foe,” though “much more… 21st-century” than previous nemeses.He will surface in episode 6 (tvline)
There will be a time jump Brennan will be in her third month of pregnancy (tvline)
Their will be trouble for Bonnie and Jeremy in their relationship.Instead of a love triangle it will be a love rectangle.(wetpaint.com)
Matt will have a bigger storyline this year.(wetpaint.com)
Tom and Lynette will separate and one or both will date again.
Renee may still be interested in Tom, and they may introduce a new woman at Tom's job.
Gabrielle is worried about Carlos's emotional state after what happened to Alejandro. She seeks the help of a priest in hopes he'll listen to Carlos's confession and absolve him.
Chuck might get suspicious because Bree has Alejandro body in the trunk and she gives him a ride to the police station and a smell becomes noticeable. (http://desperate-housewives.tripod.com/id3.html)