Board Thread:Speculation, Theories, and Rumors/@comment-15134203-20141110232620/@comment-26567650-20141226071030

Dream Era wrote: Well, the TITLE sure as hell is a working title, but to completely ignore something THIS close to confirmation bugs me. We have a very reliable source saying so, a domain purchased, and finally, indications that it's a mobile. An anonymous source from 4chan doesn't count as an reliable source, even though it got spot-on references on the Sonic Boom games. Nevertheless, the article will be published again once we get legitimate news from Sega or Sonic Team, or if any sufficient data is leaked.

So it remains as a rumour, and the article will not go up for the time being.