The fourth Digimon 15th anniversary project, which has so far spanned PSP RPGs Digimon Adventure and Digimon World Re: Digitize, and iPhone card RPG Digimon Adventure, will be announced in the April 2013 issue of V-Jump next week.
The Digimon game portal is currently teasing the news on its home page.
The magazine will be released next Thursday, February 21. The official website for the game will go live on the same day. Expect leaks beforehand.
Thanks, Re: Gigen.