Dungeon Meshi getting shows
I really don't see it transferring media very well. Recipes and ecology seem like a poor fit for the audiovisual format, and you'd need a considerable budget to do the food right, which is a tall order for a slow-paced shounen-type show. I think the things that make the manga good would wind up mostly on the cutting room floor.
Cooking anime are often pretty popular, though? You're right that they have to actually do that well, and might not get away with using the same visual shorthand the manga does (3-4 panels of prepwork, then cut to the final product), but it seems pretty workable. No idea what their budget's like, though.
Yeah, and not to toot my own horn, especially because it looks obvious in hindsight, but years ago I was wondering why shingeki no kyojin wasn't more widely known, and idly dreaming of one punch man getting a show, along with vinland, god of high school, and uddup, 2 of those 5 have kickass shows now, I only bumped into meshi and goblin slayer recently but see the same "man this could make a cool show" structures there.
I read lots of different series, lots of them are met with eagerness and excitement when they update, but I'm not as confident that they'd translate as well, but those 3/5 left are obvious fits, stylish action, arcs and plots to follow, and lots of material.
With Meshi though, it seems like the ecology stuff would be a natural fit for the little "bumper" short/break type of format, where one character explains something or pulls out a chalkboard or whatnot, then it cuts back to the main show.
Pre-post-edit: Oh! Claymore and Blade of the Immortal both need proper shows now that they're completed...
Post-pre-post-edit: Knights of Sidonia is another I was trying to think of, but it's more a general "slather everything Nihei has ever touched in modern animation and fuck my eyeholes with it" desire so it didn't pop into my head at first.