A few hours ago, EA updated their official Need for Speed Facebook page with a new profile image (a slightly restyled NFS logo), and a new cover photo, which at first sight just seems a black rectangle with the text "May 21; subscribe to see the first look at the return of NFS; www.youtube.com/needforspeed" on it.
When brightened up in Photoshop though, the cover photo reveals a crude image of two cars, resembling a Toyota GT86 and a classic air-cooled Porsche 911 in a nightly urban setting.
Whether this hints at the release of the earlier announced mobile game NFS: No Limits (which features both the GT86 and a Porsche 993), or a new game for PC and consoles with the same cars, is unknown.
More news probably next Thursday, May 21, on NFS' Youtube channel.