The good thing about Rodwell, if United were to capture him in January, is that Everton can give more development time to Ross Barkley, who seems another amazing prospect from the Blue part of Merseyside.
The good thing about going after South American talent, is that their season ends in December. So Ganso might be a possibility. Although I've long felt both him and Neymar would find their ways to Spain long before England.
The issue with Euro 2012, is that talents like Gotze want to stay put because there is a high pecking order above them in the national team and must compete for their place. If United are after a talent who already has a spot solidified, it's a more reasonable assumption that a deal is possible. But SAF went on record that he's only signed a few number of players in January in the last few years. Evra, Vidic and Hernandez are the only notable ones that come to mind.
Should be interesting to see all the movement from the top Premier League teams in January, though.
And then see him leave for around £20 million, and see only a fraction of the money to spend. The usual cycle :S