It looks like Microsoft has a late promotion in store for us for Resident Evil 6, in light of that timed-exclusivity news. If you pre-order Resident Evil 6 directly from their store, you can net $30 back in credit.
To be exact, you get a $10 in-store coupon for Microsoft, and $20 in Microsoft Points (MSP). Unless you're keen on the Umbrella umbrella or a handful of digital incentives from other various outlets, this looks like the clear-cut best deal available.
1600 Microsoft Points? That should be enough for all that on-disc DLC. Heyooooo!
Resident Evil 6 [Microsoft Store]