The marketing team behind "Scott Pilgrim vs. The World" already set up a system to give out customized Bryan Lee O'Malley-esque avatars. When Comic-Con rolls around in a couple of weeks, however, Michael Cera and Edgar Wright will reportedly be making real-life personalized T-shirts across the street from the convention center.
Beginning on Thursday, July 22, Cera, Wright, Mary Elizabeth Winstead and Anna Kendrick will be taking turns operating a "make-your-own-T-shirt stand" somewhere in or near the Hilton Gaslamp, according to The Hollywood Reporter. The promotion will be a part of a campaign called "Scott Pilgrim vs. Comic-Con" that also includes a DJ room and likely many other bells and whistles promoting the movie's August 13 release date.
At least a few of the cast members will probably have leave Thursday afternoon, I would assume, since the "Scott Pilgrim" panel is scheduled that day in Hall H. I'm also going to go out on a limb and predict that Anna Kendrick will get a few custom "Twilight" T-shirt requests while she's there, unless the people in charge have already taken preemptive action to ward off such things.