When the Digi-Egg emerges from the computer in the first part, the text in the background is from Psalm 109.
A deleted scene showed Tai and Kari's dad coming home late at night after the scene when Agumon grew huge destroying the top bunk of their bunk bed (segment 1 "Eight Years Ago").
The references to Willis were not in the original Japanese version, because "Our war game" was in continuity and "Hurricane Touchdown" was out of continuity, therefore in "Our War Game" Willis/Wallace did not exist.
The first time Digivolution occurs is in this movie (continuity wise of course).
The first appearance of Botamon, Koromon, Agumon and Greymon although not same ones Tai has in the TV series.