Really depends on what level Wanda is operating at.
She took down P5 Magik and Namor. If she took them down due to raw power output not due being the plot device (being kryptonite for the p5) then she solos. Avengers stomp.
If its regular Classic Wanda I'm going with the X-men. Danger, Magik and Magneto bring in the big time power while Emma can mind rape most of the others.
Originally posted by Glorificus
Magneto really just needs to buy Emma the 30 seconds she needs to mind rape most of Team 1...Heck if she could even mind control Scarlet Witch and turn her against her own team, I'd say Team 2 wins solidly.
* if Wanda cannot manage to somehow block Emma's full mental assault, then the X-men has the edge, the only problem is to take down a non-PIS/CIS Thor, i think Magik will come into play in that... or if Magik can teleport them all in Limbo to have an advantage...
* however, if Wanda managed to attack first with her Hex, messing everyone in the X-men, plus with Thor's strength and speed, Avengers wins most of the time...