I did this for Round One of the Transformers Cover Contest being thrown over at the IDW boards.
I went through a great deal of reference hunting and character-bio reading in the process of making this.
I was really happy with this when I turned it in, but now I look at it and all I can see is missed oppurtunity and failure.
Blegh. If I make it through to Round Two, I'll have to do much better.
The setup I was given to work from was:
"The cover you are to prepare is for the faux comic Spotlight: Onslaught. Onslaught 's robot form is to be the main focus of the cover, with his alt mode as an optional inclusion. Also, Impactor and Mindwipe, in either or both modes, must feature on the cover. The setting for the cover is the Earths moon. "