Take-Two has confirmed what most people expected: there will be a new WWE video game in the coming fiscal year. The company confirmed (via Cinema Blend) during their third-quarter earnings call that WWE 2K15 (and NBA 2K15) will be released during the company's upcoming fiscal year. That means we will see the game between April 1st, 2014 and March 31st, 2015; it would make sense that the game will release on or around the same time October/November timeframe as WWE 2K14, as it comes right in time for the holiday season and has been the release date for WWE games going back to WWE SmackDown! vs. Raw 2006.
While WWE 2K14 was released only on the now-previous generation of consoles, WWE 2K15 is more likely to be released on the current generation (Xbox One and PS4).