Considering The NPD Data shows that his title sold in the fiscal month ending on APR 7 and that the title was released on APR 3rd, in 5 days of sales it moved 300,000 units. Incredibly impressive sales numbers. In 5 days it managed to take 3rd place over all in the months cross-platform sales chart. Even though this stock is at it's highest price point, I believe it to be undervalued.
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Information taken from http://xbox360.ign.com/articles/782/782139p1.html
and of course the NPD sales data presented on next-gen.biz website.