Board Thread:General Discussion/@comment-5949188-20140704194818/@comment-4714158-20141229185339

Even though the tweet is highly likely a fake, it does not mean that there won't be another Inazuma Eleven in 2015.

In an interview with 4Gamer, Hino mentions a new Inazuma Eleven project for next year (as well as Youkai Watch of course).

http://www.4gamer.net/games/000/G000000/20141219102/index_9.html#lv5_hino

It's mentioned in the answer to the 4th question.