I think it would be like Wall Street (the movie) .Well since Romania is now part of the EU (transylvania is a region in Romania) I think that Dracula might take advantage of the current financial situation to take over Europe. Actually he is responsible of EU's financial crisis.He works as a trader.
He also infiltrated the Vatican. Actually, he is the Pope himself. Kidding

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Oh and he lives in Dubai now, in burj Khalifa.
As for Julius he is studying economics in order to save Europe from bankruptcy and from Dracula's evil influence. He likes to wear tuxedos, leather jackets and rides a Harley. Remember the RoB intro. Well imagine him doing the same thing while riding a Harley. Epic.
I don't know if Castlevania should have a modern setting. I always felt like it should take place in the past. Maybe because I don't like this century that much.And Castlevania is supposed to have this gothic/classical feel , in terms of music ,clothing, architecture etc. And frankly this period isn't gothic or classical at all.