Some of the most exciting Deadpool 3 leaks that preceded the Deadpool & Wolverine premiere concern the credits scene. Specifically, we learned in mid-April that the film has a mind-blowing credits scene, with an insider wondering how Marvel pulled it off without it leaking. Then word got out a few weeks ago that Marvel wanted a specific cameo for the Deadpool 3 credits scenes, but it didn't work out.
At neither point did the Deadpool & Wolverine credits scene actually leak. We had no idea what we'd get from it...