The Death of Wolverine is official.
Below you can check out the spoiler-filled image revealing Logan covered in adamantium.
Basically what went down is, Wolverine having lost his healing power stops Dr. Cornelius from turning people into versions of Weapon X.
Cornelius needs to inject the new Weapon X candidates with adamantium, but Wolverine intervenes by sacrificing himself and puncturing the adamantium tank, which causes the adamantium to pour out, encasing and entombing him (forever?!).