 The mark on Guilmons body, which glow on Megadramon, is called the  "Digital Hazard", much like the hazard sign of a nuclear meltdown.  As explained in another continuity, Digimon Chronicle. The Digital  Hazard causes a chain of events that destroy the entire Digital  World when it has overloaded capacity. Takatos dreams scenes are  much like Shinjis in Evangelion, but Shinjis had most of the  Evangelion cast. A new type of Digimon Evolution, Human + Digimon  (episode 3.35 "Give a Little Bit").