Both consoles will be on sale for Christmas 2013 and both will be at E3 in 2013, both current consoles are 5-6 years old, so its time for a update to give developers more room to design better games.
EA ceo in a recent interview said ''there’s no place for new IP this late in the console cycle.” and “He can’t think of new IP that launches five or six years into a generation of hardware that is successful. It’s just not the time to do it.”
With all the other rumours it makes preety good odds for a 2013 release, 2013 will proably be a light release cycle with prehaps a few decent games- most will likely hold till the console release.
As for giving the wii U a advantage its not that much of a threat to sony/mircosoft as they would have pushed out the next generation of consoles this year.