I would implore you to include feminist and queer perspectives and artwork for a broader understanding of how (hyper)masculinity is constructed, challenged, and negotiated in Urban Guatemala. A visualization of the bus routes could further enrich your ethnography too.
The image is grotesque and funny. I don't know how to enrich it further. I would be curious to see the image in its context as a piece of public or gallery art, to see it seen by other viewers. But as presented I think it is an image rich in ethnographic import.