Few details were known about the manga, except that Yusuke Kozaki and Shin Kibayashi–the artist and story director for Fates respectively–would be teaming up and that the manga would be debuting before the end of 2015.
However after that window passed and there was no more news about the manga, it became clear that it probably wasn’t going to happen. Perhaps the announcement was merely a figment of our imagination? Not quite.
In a recent tweet, Mr. Kozaki confessed that the plans for the manga are currently on hold, for reasons undisclosed.
Regarding the Fire Emblem manga, due to various circumstances, right now the plans have essentially been suspended. Everyone who was looking forward to it, we are deeply sorry. Personally speaking, I would like to draw FE as a manga one way or another.
While it’s not 100% clear from the wording whether the manga is still happening or not, from the way Mr. Kozaki ends the tweet, it does sound like it’s not going to happen any time soon…