Yggdrasil appears to be the main enemy in Chronicle. It has attempted to delete all Digimon with the X Program, and it's sent the Royal Knights after the survivors. It was the host computer for the Digital World.
The Royal Knights work for Yggdrasil, believing that he has good reason to delete the Digimon. There are thirteen Royal Knights total; the only ones we know so far are Magnamon, Omegamon, Dukemon, Rhodo Knightmon, Dynasmon, Alforce V-Dramon, and Alphamon.
He appears to be Kouta's rival or enemy. It's possible Yuuji is his brother. Otherwise, little is known about Shinji, other than he seems to be the Tamer of the Royal Knights.
Death-X-mon was what Death-X-DORUghoramon evolved into after DORUmon's data was extracted...it seems that he's not truly alive, and he's rampaging through the Digital World...
The new anime continues to air weekly in Japan.
Card Game Alpha Evolve.4
Digimon Savers: The Movie
The chapters continue to appear monthly in V-Jump.
The US version is set to appear later this year.
Digimon Mini Ver. 2
Japan. The latest V-Pet came out March 18th.
Japan. The newest Japanese card game set came out in early April.
Figue Cube Mini
Japan. The Digimon Figure Cube Minis came out late April.
Japan. The fourth version of the Digimon Accelerator came out November 19th, in two colors - red and blue.
Japan. The DVD came out on November 25th, almost a year after the movie first aired.
Japan. November 23rd.
Japan. The first Japanese Digimon manga since V-Tamer, Digimon Next came out in a recent issue of V-Jump.