No... again, it's been confirmed that this was nothing more than a rumor.
http://www.hollywoodreporter.com/heat-vision/sesame-street-movie-works-fox-339374 I think it wasn´t just a rumor...
Hmph. The fart shoes probably cost too much.They tried to have Elmo make a cameo in THE MUPPETS (2011), but apparently they couldn't afford it.