Tomorrow you can find a free preview issue of Avengers Vs. X-Men at your local comic shop.
We've already seen the John Romita Jr. art featuring a first look at Iron Man vs. Magneto.
The issue also has a feature called "Where Will They Stand?" with Nova among the list. In addition, "Wild Cards" is stated on the page.
Nova is given the role "Trailblazer" with the powers of "Flight & Energy Manipulation."
However, what if Nova has already chosen his side?! See second pic! (Actually, Doug Smith from the Nova Prime Page pointed out the similarity, which we had a short conversation about - but we shall say no more!)