That is a Squirrel Girl painting by Nina Fike.  It is an original art sketch card that was approved by the mothership at Marvel Comics and will be inserted into Upper Deck’s new Kree Skrull War trading card set.  Starting July 20th, collectors all over the planet will be ripping open foil wrappers trying to find Doreen Green.  You can see by the look on her face, Squirrel Girl is not quite sure what to make of this.

Especially since she was also painted by Melike Acar.  24 more days until Squirrel Girl’s appearance in the Kree Skrull War hits Earth!