HOFFMAN ESTATES, Ill. -- It appears as though Alistair Overeem 's next fight will not be for Strikeforce after all.Glory World Series released a poster on Wednesday for their upcoming October event, and front and center was the Strikeforce heavyweight champion. MMA Fighting then confirmed with Martijn de Jong , Overeem's trainer at Golden Glory and Glory World Series promoter, that "The Reem" will in fact be fighting on the card."No opponent named yet but probably a MMA match," de Jong said.Overeem was removed from the Strikeforce heavyweight grand prix last week after he told Zuffa he wouldn't be ready to fight Antonio Silva in the semi-finals on Sept. 10."Strikeforce promised me a date in the fall (October/November), I acted on it and chose to go on holiday and start my training in August," Overeem explained to MMA Fighting via e-mail . "Zuffa/Showtime then decided to do it in September and then the ball was in my court, and I had to decline because I know it's too short of time to be prepared 100 percent Instead of postponing the event they decided that the show must go on and use one of the alternates."The next Glory World Series event will take place in Moscow, Russia. Sergei Kharitonov, another Strikeforce heavyweight who has fought for Glory in the past, is also featured on the poster.According to de Jong, the event will take place in late October, but no exact date has been finalized just yet.