Not sure if there’s more to this story than what’s here; I’m very interested to find out what happened with the proposed series. I’ve followed his work ever since he started publishing in the Kitchen Sink Press anthology book Snarf, where he used a format that would tell a (usually autobiographical) story in a single page through dozens of postage-stamp-sized panels. His later work would employ longer narratives and more conventional comics storytelling, as above. He’s one of those people who has done far less work than you’d like (assuming that you weren’t turned off by the subject matter) for no apparent reason; at some point several years ago, he just seemed to stop.
The last I heard of him was when he was interviewed for a story about the reprinting of Gasoline Alley newspaper comic strips; a lot of the strips were reproduced from Matt’s extensive collection of classic strips. Matt bitched about how little he was paid for loaning his collection for reproduction, relative to what he paid for them, but the article noted that Matt had severely reduced the resale value of the collection by cutting the strips out of the newspaper pages and mounting them on cardboard backing. (Imagine someone doing that with Action #1, for example.) He was also part of a loose group of cartoonists when he lived in Canada that included Seth and Chester Brown; he also worked with Matt Wagner and was buddies with Bernie Mireault as well.