So… I’ve written about these comics-panels-with-multiple-images-across-one-background before, and have been collecting examples from the 1900s through recent years. They’re called polyptychs or multi-panel pan sequences or multi-pans… but I just learned a new term for them: Super Panels. Ay… it’s so refreshingly low-brow! There’s a good collection of them, with discussion, etc., at Michel Fiffe’s website.
Go there and see lots of good examples and commentary – including some gratuitous ones he’s critical of.