Weekly Process Roundup, 4/29/11

The weekly process roundup is a collection of sketches, pencils, inks, thumbnails, everything other than finished product, from The Long and Shortbox of It's favorite artists and illustrators, hitting every Friday.

• David Aja draws some killer covers for the new Red Skull mini! (above)
• Chris Samnee sketches Captain America: The Fighting Avenger (and then inks him, too)!
• Sean Phillips is posting all sorts of Criminal related stuff.
• Paolo Rivera's Wacky Reference Wednesday is back!
• Cameron Stewart does a pin-up!