I think the only new scripted shows that aren't out yet are CBS's Golden Boy and Friend Me and CW's Cult and The Carrie Diaries, which are scheduled for mid-season anyway. Maybe I'm forgetting something, though.
ABC:
http://tvline.com/2012/05/15/abc-fall-2012-nashville-666-park-avenue-video/
It's got trailers for new dramas Last Resort, Zero Hour, 666 Park Avenue, Nashville, Mistresses, and Red Widow. Plus new comedies The Neighbors, Malibu Country, How to Live With Your Parents (for the Rest of Your Life), and The Family Tools.
NBC:
http://tvline.com/2012/05/14/revolution-new-normal-videos-fall-preview/
It's got trailers for new dramas Revolution and Chicago Fire. Plus new comedies Go On, The New Normal, Animal Practice, and Guys With Kids.
http://www.slashfilm.com/trailersclips-nbcs-tv-series-save-1600-penn-infamous-caller-normal-go-on-guys-kids-harm/
And this one has clips of new dramas Infamous and Do No Harm. Plus clips of new comedies 1600 Penn, Save Me, and Next Caller.
CBS:
http://tvline.com/2012/05/16/cbs-fall-tv-lineup-2012-videos/
It's got trailers of new dramas Elementary, Vegas, and Made in Jersey, along with new comedy Partners.
FOX:
http://tvline.com/2012/05/14/fox-fall-2012-video-the-mindy-project-the-following/
It's got trailers of new dramas The Mob Doctor and The Following, plus new comedies Ben & Kate, The Mindy Project, and The Goodwin Games
The CW:
http://tvline.com/2012/05/17/fall-2012-cw-lineup-videos/
It's got clips of new dramas Arrow, Beauty and the Beast, and Emily Owens, M.D..
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"First time I got punched in the face, I was like "oh no", then I was like "this is a story"."