(“We’ll see who is bag of douche.”)

Dream’s sixth event — which goes down September 23rd in Saitama, Japan — may just feature its most compelling card yet. The show’s centerpiece is the semi-finals/finals of the middleweight grand prix, where Melvin Manhoef, Gegard Mousasi, Ronaldo “Jacare” Souza, and Zelg Galesic will do battle to crown a single champion. A welterweight strap will also be on the line, decided by the long-awaited match between Nick Diaz and Hayato “Mach” Sakurai. And now it looks like two big-name heavyweight bouts will be part of the action as well.

Over the weekend, PRIDE vet and reigning Strikeforce heavyweight champion Alistair Overeem revealed that he would be facing Mirko “Cro Cop” Filipovic at Dream 6. Overeem and Cro Cop have been getting their trash-talk on lately — who isn’t these days? — with the Demolition Man calling Filipovic a “douche-bag” who ducked him in favor of fighting cans. Cro Cop hasn’t fought since March, when he earned his first post-UFC victory with a 56-second TKO rout of Japanese can Tatsuya Mizuno. Since then, Overeem has competed and won twice, scoring a quick knockout of Tae Hyun Lee at Dream 4 in June, and an almost-as-quick submission of Mark Hunt at Dream 5 in July.

This month’s Dream card will also feature the return of Russian PRIDE standout Sergei Kharitonov, who hasn’t fought since his TKO victory over Alistair Overeem at a K-1 HERO’s event last September. Kharitonov will be facing Siala-Mou “Mighty Mo” Siligia, the Samoan-American K-1 mainstay who defeated Justice Smith last month at the K-1 World GP 2008 in Hawaii. Mo is just 3-0 as a mixed martial artist, and hasn’t done the MMA thing since last June, when he beat down Ruben Villareal at K-1 Dynamite!! USA.