According to reports, Google is planning on revealing their next iteration of the Android OS in June of 2012. The release date would coincide with Google’s annual developer conference, Google I/O, which is typically held every year around the end of June so this move would not be a complete surprise. However this update may be a little too premature since Android 4.0 (ICS) is only available on 1 to 2 percent of Android devices but with Google activating around 1 million Android devices a day, the percentage is expected to increase significantly.
http://news.cnet.com/8301-1035_3-57402420-94/android-5.0-aka-jelly-bean-rumored-for-q3-release/