Our trusty tipster JDUDE11 has been holding out on us. Seems SPFIITHDR isn't the only unreleased game with its very own Xbox.com page. In fact, there are at least five others. If your appetite for XBLA teasers (and delays) has yet to be satisfied, feast your eyes on these.
Of course, I should have realized that there were easier ways to find these pages than trying to type in every game title as an URL. All I needed was to go here and scroll. Stupid me.