The British boxer will look to avenge his defeat to Eubank Jr in April when the duo clash again at the Tottenham Hotspur Stadium on Saturday (15.11.25) and believes that atoning for his loss will mark the end for his rival in the ring.
Benn told Sky Sports: "I think Chris will retire after this fight.
"He's fighting a welterweight. Just look at the landscape. He isn't going to stay at 160lbs and fight a Janibek [Alimkhanuly] or a [Hamzah] Sheeraz, for half the money. It doesn't make sense.
"He's fighting a welterweight. I'll drop back down to welterweight and carry on pursuing my goals and dreams at 147. This is my final fight at 160."
Benn moved up two weight classes to take on Eubank Jr - with the first bout echoing the epic contests between their fathers Nigel Benn and Chris Eubank during the 1990s - and he is looking to pursue a world title at welterweight in the future.
The pugilist said: "It's been the bane of my life for the past three years. So I just can't wait for this to be done and over with and I can just move on with my career.
"My goal is to win a world title at welterweight. Right now my goal is to get back down to welterweight. I have the best team, nutritionist, a chef to get back down to 147."
The clashes with Eubank Jr have been lucrative for Benn but he insists that he is not only motivated by money.
He said: "How much money do you need? Or how much money do you make? I feel like I've put three years of my career aside for this fight. To the point now where I wouldn't be complete if I retired a multi-millionaire and didn't have the world title.
"I'd be upset with myself… I don't know. It doesn't sit right with me. I get money is everything, you need money to live but ultimately for me, to have the money and the belt that's perfect.
"Enough of Chris, enough of the Eubank/Benn names, I just can't wait for it to be done and over with and just move on with my career."