Interesting comment from The Shogun here. Considering Sony has marketing rights to Mortal Kombat, April seems to be a lock barring a surprise price cut from MS.
While I think MKX will sell LOTS of copies. I don't see it selling a console if it's bundled if that makes any sense.
Oh its selling systems. With or without a bundle.
You can read his subsequent comments on this page of GAF's Feb. NPD thread.