I don't know know whether someone remembers what I'm talking about. In 2018 or maybe 2017 some company mentioned they are going to do a 5e setting book with a whole campaign or at least some adventures, that are a bit ancient Greece inspired (way before the Hellenistika announcement). It was a fantasy setting. They even had a concept picture but I don't remember how it looked. I'm pretty sure I read about it on Enworld but I can't find what it was.