There are too many unanswered questions for this to be the last episode...
Dante shot Tosha!!! I read the episode guide on HBO. Darn that's why Omar was all up in the air when the police asked for a shooter.
Fruit punked Cutty on a package. Cutty was about to take the little guy out but at the last minute came back to reality. What's going to happen with that?
What about Kima and Cheryl?
And, while reading the guide I read this:"
Greggs and McNulty press Bubbles back into duty to gather street intelligence on the Barksdale gang, which has lost its prime territory, the Towers. Bubbles discovers that some of the city's best turf — downtown near the lunchtime crowd looking to score — is now controlled by "a young boy name Marlo." He also offers up the tag number of the Marlo's SUV. Looking into Marlo's background, Greggs discovers that he was a murder suspect until a witness who'd agreed to testify against him was found dead — two bullets in the chest and one in the mouth — and Marlo went free. "

So that's his MO. Something better happen to Marlo!!!