Deadpool #4-7 (2009)

Deadpool is hired to assassinate a doctor in Easter Europe and fights some zombies.

Meanwhile, Tiger Shark (who looks very different) has been hired to kill Deadpool.  Deadpool (seemingly) kills him.

Then, Deadpool tries to blackmail Norman Osborn, and Normie assembles his new Thunderbolts team to kill Deadpool.

This is setting up the next story. But I can tell you right now I’m not happy. Ant Man is a low-rent thief. It’s not believable that he would be part of an assassination mission.