Funny stuff, iancontinence! Archie Goodwin was a great force in comics, and his Star Wars work was one of the things that brought me in as a reader in the first place.
For those of us with failing eyesight, here's what the message on the bag says:
DEAR DAVE --
OKAY, I CAN LIVE WITH A GREAT SERIES LIKE WATCHMEN BEING DONE AT A RIVAL COMPANY. BUT DO YOU AND ALAN HAVE TO RUB IT IN BY MAKING MY LOCAL SUPERMARKET GIVE OUT THESE GROCERY BAGS THANKING ALL YOUR READERS NOW THAT THE DAMNED THING'S FINALLY DONE?!