EA Sports confirms that Madden NFL 14 will launch on August 27, 2013. Probably. The graphic above -- which amounts to EA's only comment on the matter thus far -- doesn't explicitly peg "Madden NFL 14" for the August release. It merely indicates that the Madden series, celebrating 25 years of life in 2013, is doing something important on that day.
Anyone who thinks that the image above refers to anything other than this year's iteration of Madden NFL is probably wrong. It's possible that EA Sports has more extensive PR/marketing plans than usual due to the 25 years milestone, but the yearly football sim always arrive in August, to coincide with the imminent launch of the NFL season. That's not going to change.
So until you hear otherwise, look for Madden NFL 14 on August 27, 2013.