Arlovski is on the show, but they haven't yet officially announced if he's in the Final 16 or one of the 'Super Fights':
Michael Schiavello broke the news that former UFC heavyweight champ Andrei Arlovski will fight October 2nd at the K-1 World Grand Prix Final 16 in Seoul, Korea. During the King of the Cage broadcast, Schiavello added that Arlovski will not participate in the tournament, and he instead will be involved in a superfight against a yet unnamed opponent. Dave Walsh at Head Kick Legend runs down the back-and-forth between FEG and Arlovski:
The Arlovski and FEG saga has been ongoing for about a year now, with Arlovski first rumored to be fighting Tim Sylvia at DREAM last year, with the fight falling through for both men. Then Arlovski and his camp signed on to fight Alistair Overeem at Dynamite!!, only for Bas Boon to decline the fight and FEG to decide it didn't work with their SRC vs. DREAM theme for MMA fights anyway. There were rumors of a fight with Barnett earlier in the year, as well as fighting for the DREAM Heavyweight title against Alistair Overeem only for Arlovski's camp to pull out of the fight when negotiations fell through.
Walsh also notes that "until [K-1 President Sadaharu] Tanikawa let's the words escape his mouth at a presser, take it as a rumor with a chance of showers."