Big Texas Comicon 2027 Big Tex Comicon is a pop culture convention taking over the Henry B. Gonzalez Convention Center in San Antonio. Think comics, fandom and all the geeky fun you can handle, spread across the big halls of one of the city's best-known venues. Expect a lively, crowd-filled atmosphere where fans of every stripe can geek out together. It's a great pick for comic lovers, cosplayers and anyone who loves a good convention.