I ended up losing this thread of view, I'll put here some details of the interviews that the mangaka of Digimon Xros Wars recently participated. 1) The relation of Omegamon and Shoutmon is more literal than we thought. Shoutmon actually arose from a Digitama which was formed from the data of Omegamon's power and thought from when he was killed by Bagramon and Tactimon.
2) The greatest source of knowledge of Nakashima was in fact the Digimon Animes Memorial Book, which is interesting since earlier in the interview he actually made reference to Digimon concepts that was explained in the Memorial Book, as the relation between the Evolution and Psychology. After that he revealed that he took a look at books produced by Bandai (possibly the source of the various DRB references) and also blogs made by the fans themselves.
3)He still believes he would like fans to accept Xros Wars as part of Digimon, but he understands those who do not like it. They at least ask people to enjoy the Digimon that appears in Xros Wars.
4) He mentions that it was not possible to create a story based on Hunters, but he says he really liked Hunters and his characters. He also said that if it turned out to be a manga, Hunters would be closer to the anime, but with a bigger focus on Taiki's friends who got very overshadowed in the second and third season of Xros Wars.
5) The reason Milleniumon was used was because Mugendramon and Kimeramon are based on "fusion of several Digimon" that already fit the context of DigiXros and so it would be easy to put Milleniumon in history. And of course, as it is related to space-time powers, it would be easy to use it as an explanation for the space-time distortions that were occurring in history. In addition, he explains that he does not really have much knowledge of Mille's story in Wonderswan games, so he did not use many details from the games. But that Digimon with great knowledge as Jijimon and DarkKnightmon knew about the other Mille that existed in the past.
6) There would be a scene involving Bagramon and Lucemon, with Lucemon being Bagramon's main target as being close to Tactimon. However, Bagramon was unable to convince Lucemon to follow him and he chose not to intervene in the events, and only to observe the consequences of Bagramon's actions. In fact, it was at this very moment that Lilithmon would find Bagramon and decide to follow him.
7) He says that after SkullKnightmon is purified and turn over a Holy Knight he would act as a Tsundere, helping the protagonists but still in his original style.
8) If he could he would have used Gankoomon and Jesmon in this story. He also comments that because Examon has been a very new Digimon and he is very big, he can not do much besides put him in a picture in the manga.
9) His favorite songs are Butter-Fly, Brave Heart and Never Give Up