It's difficult to say which unranked teams will end up ranked at the end of the season, given that the preseason rankings haven't come out yet.
Of course, it's easy enough to project the 2012 preseason rankings.
Take the rankings at the end of last season, shake out some of the anomalies such as Southern Miss, Houston and Cincinnati and replace them with potential anomalies for this season. If there are any spots left over, add blue bloods that had a weak 2011, but look promising for 2012. For example, Texas or Ohio State. Finally, mix in a bit of Notre Dame and you've got the 2012 preseason rankings.
However, I'm not going to make that projection.
I am looking at the end-of-last-season AP rankings. Any team that was not on them, for my purposes, is considered unranked.
Based on that, which teams that ended 2011 unranked will find themselves in the Top 25 at the end of 2012?