It was a subtle moment, but eagle-eyed viewers noticed that the credit sequence rolled by for Episode 4 without including Steven Yeun's name. Now that it's been noticed, it does seem like a very obvious ploy to make the audience believe he's a gonner. The fact that there was no direct confirmation of his death means that we're almost certain to see Glenn in some shape or form, so simply dropping his name from the credits was an attempt at causing confusion, though his name is bound to crop up again when we see what's become of the fan favourite.