So for Worlds Collide is it cannon? Also will we ever see Ryu, Oren, or Kaz again?
It is not a part of the canon series. It was created after discussion with my co-creator to create a digimon/pokemon world with the characters you have come to love in the series. You will not, I am sorry, will say the protagonits from Worlds Collide. As for Oren(a) and Kaz, that will be something to find out in DR3.