Conor McGregor spoke to media in the aftermath of walking Olympia Michael Conlan out for his pro debut at Madison Square Garden and watching the new Top Rank addition score a third round stoppage.
UFC champion McGregor is constantly linked to a cross-codes bout with Floyd Mayweather Jr. as both sides attempt to trash out a deal for the second half of 2017.
Despite Mayweather recently stating he wanted a battle in June, McGregor told IFL TV in Conlan's dressing room the agreement was more likely to be September.
"F*** Floyd! Trust me, this boxing world don't know what they're going to see when I roll up in here," said McGregor to Kugan Cassius.
"I'm unpredictable. Nobody knows what they're in for. Everybody's writing me off but they're going to be in for a shock. Make no mistake about it.
"I'm ready, I look forward to it. I'm excited and prepared. We are very close to inking it but I'm not saying anymore. We're very close, that's it," he added.
'The Notorious' has been sparring several boxers since the spring of 2016 in a bid to brush up on his skills after switching to MMA when touted as an Irish amateur boxing star of the future in his teens.
McGregor will be going straight in at the deep end for what effectively will be his pro debut against the best fighter of the last generation in the now unretired 'Money' Mayweather.