brilliant idea:
taking what chesta said, which is brilliant, and my own theory,i have thought of this:
chesta thinks the order are evil: maybe they just use the whole 'worshipping sparda' thing as a cover-up for there actual plan: to gain the power of sparda (as arkham did). they know that they need both dante and vergil's amulets. somehow they got vergil into nero's arm so that they can get the amulet without awakening vergil (because they know vergil wants sparda's power for himself). but of course, nero can't be in on the plan because seeing as they are both in the same body, vergil will know what nero knows. so nero is oblivious to the evil plan.
someone, maybe a member of the order, was ordered to tip dante off so they can trick dante into coming to their island.
chesta;37583 said:
dante think: since nero is a member of the order he must have knowledge of the evil plan from the order (but in reality nero doesn't have knowledge of the evil plan)
so dante and nero think they have to battle each other
then as they need the blood of the 'sacraficed woman' lady should be making an appearance