Avenger Angel - Updated

Now that Avengers VS X-Men is over, I presume it's safe to call this promotional image by Salvador Larroca unpublished.  This image appeared along with other alternate covers on various comic news websites, but did not appear as an alternate cover for any of the issues.  The likely reason is that by the time the series came out, Angel no longer appeared in this costume.

Update!

Shortly after posting this, I discovered that this image was used as an alternate cover for Avengers Vs. X-Men #9.  The cover image is posted below the promo art.  Unpublished X-Men promises more diligence in our fact checking, we stand unwavering against the army of variant covers coming at us from all sides!

Uncanny X-Men 388

Here's an unpublished cover for Uncanny X-Men 388 by Salvador Larroca.

X-Treme Unpublished

 X-Treme X-Men had planned to have a series of 6 covers that joined to form one large image.  While Bishop, Sage, Storm, and Cannonball appeared on the covers for issues 20, 21, 22, and 24, the covers for Gambit and Rogue were never published.

Oddly enough, the Gambit cover did appear on the Amazon listing for the 

X-Treme X-Men Volume 6: Intifada trade paperback, although it was not used for the cover.

To date, the Rogue art has not been used anywhere, but finally Salvador Larroca's original art can be seen here!