By the way, Wonder Man has no credits scenes. I suspect that's because it will be a standalone one-off like Moon Knight. While Echo was also a one-off, it was't a standalone series - it spun off from Hawkeye and also featured a character integral to the Daredevil series, hence why it ended with a credits scene teasing Kingpin's role in Daredevil: Born Again.
I would love to see Simon and Trevor again -- just as I would love to see Marc/Steven/Jake and Layla again -- but who knows if or when or where that will happen!