This issue of Sergio Aragones Funnies has a couple Groo appearances, two of them on the cover. First, there are some pages of a Groo comic on a shelf by some back issues of Plop and dolls of Maggie Simpson, Astro Boy, and Nancy:
And then there are some more pages on the floor, hopefully suggesting that Sergio is currently working on a new Groo comic (I can dream):
Later, another studio scene has some Groo comics piled on the floor:
And that's it, but on a non-Groo-related note, I was amused by Sergio demonstrating a model guillotine with a Usagi Yojimbo doll:
Take that, Stan Sakai!