I selfishly wouldn't mind if they reprinted the Genosha story because my copy of the X-Tinction Agenda OHC had some weird lines down the pages in several of those issues. However, that's most likely a problem unique to my copy. Even so, I'd still probably prefer the pages be devoted to something unique to the OHC format, than a reprint that would only slightly upgrade my existing copy.

"Hey, one flies and is only vulnerable to Kryptonite, and the other guy only has a cool car. It’s just no contest." -Christopher Reeve on "Batman vs. Superman"