UPDATE: Well, that didn't take long. Apparently, according to the director himself, there is no LOGAN end credits stinger! Which sucks, because it makes claw/stinger jokes usless (or more useless than they already were), but otherwise sounds much better. HOWEVER, according to Collider (again), it seems there may still be something added to the runtime, possibly at the beginning. We'll keep you posted.
So apparently LOGAN is going to have an after-credits stinger. Which makes sense because…you know. He's in a big studio comic book film.
Also he has big claws (BOOM! Nailed it).
Ahem. Anyway. This is actually somewhat of a surprising development, since LOGAN is set up to be the last Wolverine story – meaning it shouldn't be setting anything else up. Yet, here we are. To be fair, it could be an epilogue or coda, but I wouldn't put it past the studio to have it end in a way where just in case he wants to Hugh Jackman can come back somehow.
Either way, I guess we'll have to wait-and-see when LOGAN claws its way into theaters March 3rd, 2017.