The sonnet of the comic book form? Probably the nine-panel grid. In a way, they work very similarly. The development in the first two rows, followed by a turn/volta in the last one.

See Watchmen, by Alan Moore and Dave Gibbons, for example. It's probably the most formalist graphic novel created in the 1980s (as opposed to, say, Elektra Assassin, by Frank Miller and Bill Sienkiewickz, or Will Eisner's The Building, and later Mr. Punch by Neil Gaiman and Dave McKean and Kabuki by David Mack, where the panels are literally exploded). While it's been described as a deconstructivist take of the super-hero archetype (I fail to see the deconstructivist elements of it, personally. No matter what, Watchmen is still a story about perverts in spandex), every page in Watchmen follows a variation of the nine-panel grid. For example, in the third chapter, Rorschach enters an apartment (row 1), finds Moloch dead (row 2), opens a fridge and watches through the window a couple having sex in the apartment across the street (row three). And every page follows more or less the same structure without fail.

Or in the panel on your left, Dr. Manhattan attends a press conference (row 1), a journalist asks him a question (row 2), said journalist asks Dr. Manhattan a trick question (volta and row 3). The variation being here that two panels in each row is fused (compare this to a trochaic substitution).