Straight from an e-mail from Mr. Sal Abinnanti himself:
"We're booth 2419 at SDCC we'll have over 12 portfolios of new original art on display for viewing and purchase. Rough, tight finished sketches to full size water color originals from Alex's DC, Marvel and Indy projects.
We will also have a new assortment of Alex Ross sketchbooks and lithographs only available at SDCC.
Alex won't be attending the con, but make sure you drop by their booth and get yourself some cool swag.
Stay tuned, I'll post some more info and images as soon as possible. Thanks again to Sal for the info.