 If you liked
Digimon Adventure 02: Diablomon no Gyakushuu
|
 ...then you might like
Summer Wars
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Similar story line, similar style of drawing, similar type of action-packed drama. Digimon follows selected characters who find themselves virtually attacked by a digimon. Within this virtual world, they send their own digimon to fight against the villian, saving the virtual world and mankind from destruction.
Similar Summer Wars follow a similar plot. Selected characters are used, computers are used, and virtual world is used. A villain comes and disturbed the virtual world and selected avatars stood up against it and fight: both virtual world and mankind is saved.