Analysts at Stern Agee believe EA will push back the release of Battlefield 5 to 2016, though this kind of statement seems a bit strange considering EA haven't made any official news on the existence of Battlefield 5.
The firm gives three reasons for this belief. First, EA may want to avoid franchise fatigue. Battlefield Hardline, the cops and robbers spinoff, is out in March 2015.
Second, EA is apparently feeling very confident about the release of its other shooter, Star Wars Battlefront. A year and a half ago, EA said it was targeting a Summer 2015 release for Battlefront. It is unclear whether or not that is still the timeline, but fans should be happy to hear of EA's confidence.
Finally, Stern Agee thinks EA simply wants to spend more time developing Battlefield 5. Battlefield 4 was infamously plagued with technical problems, and Battlefield: Hardline was pushed back from its original October release due to poor reception and a rather lackluster beta.
Either way, hopefully we'll be hearing something a bit more official sometime down the track.