This special on nico nico revealed a brief trailer of Chapter 2 Ketsui with sneak peak of Rosemon, Vikemon, and Impredrialdramon, as well as a mysterious man.
Then, later screen says:
"Then a new story..."
Shows Patamon waves and says "Good bye Takeru."
As Takeru screams after Patamon.
Chapter 3, 告白/Kokuhaku/Confession will release in Summer 2016.
Special thanks to Ong Khai Shen for the picture