Lautner assured fans that "unfortunately [for him]" The Twilight Saga: Breaking Dawn - Part 2 will indeed include some shirtless Jacob Black action. It's been a staple of the Twilight franchise ever since his character got more play in The Twilight Saga: New Moon, of course, so the send-off wouldn't be right without Jacob's abs on-screen.
Lautner also supplemented what Robert Pattinson had to say about the ending to Part 2, adding, "This one wraps up really nicely. It has a very high point. It’s super, super epic, but it comes to a nice end, and I think it’ll be emotional for everyone to see."