Looks like the video game tie-in ‘ DMC Devil May Cry The Chronicles of Vergil’ is sold out through Diamond and cannot be reordered. This is not something that appeared on the Diamond Comics Advanced Reorder list and could have a small print run as it is coming from a small Press company Titan Comics.
Video Game Tie-ins have done well in the past, ‘Injustice Gods Among Us’ comes to mind, but others have not done so well.
Remember, when something sells out at the distributor level, it does not mean you cannot get it in the store, it means your store cannot reorder and once they sell out its over (or on to reprints.)