The Sonic Stadium has discovered some concept art pieces from 2012 racer Sonic & All-Stars Racing Transformed. The highlight is the above collection of items and weapons featuring many that went unused. See more after the jump!
The other two images (seen in the gallery below) feature concept work on Dr.Eggman’s and Vyse’s vehicles in their various transformations. The images came from a portfolio from someone who worked on the game, linked below.
Source: Sean Jeon’s portfolio