I think i'm the only one who liked the ending (major spoiler alert)

Rating: Null/10 (8 October 2006)

i liked the ending for these reasons, the same reasons people disliked it: 1. Costingan getting shot: I think it was necessary, even though I loved that character more than any other one in the film. If he would've turned Sullivan in, and gone through the rigmarole of due process it would've been satisfying, but not as much as seeing him get popped in the temple. Sheen's character dying on top of Costigan getting shot made me want Sullivan to die that much more.
2. The phantom envelope: My theory is it was information on how to contact Wahlberg's character in case something should happen to Costigan, which is why Wahlberg showed up to pop Sullivan.
3. Whose baby is it?: It's most certainly Costigans. They never say it, but you can infer by the fact that she shows up to the funeral. Why would she show up? She had to have known Sullivan would be there, and it's was obvious she wanted nothing to do with him anymore. Furthermore, she was heartbroken at his burial, and besides a few intermittent visits and a torrid little tryst, she constantly avoided Costigan. I just think it was his baby and she was paying respects to it's father.