But, who's on AJ's dream list of ringside stars for his massive "Clash on the Dunes" fight in Saudi Arabia on Dec. 7? We asked. He answered. It was awesome.
"Barack Obama, The Rock, Will Smith, Jay-Z, Beyonce ... some Instagram models ... I'm getting to the fantasy part of my brain now!"
In all seriousness, AJ tells TMZ Sports he has a totally different approach to Ruiz this time around -- and realizes how many people are counting on him to avenge his loss.
You gotta watch this clip ... Joshua says he now realizes how devastated his fans in England (and around the world) were after his loss and it motivates him.
"I took my first L as a professional and started realizing, yo, there's people out there who are REALLY rooting for me, feeling emotionally, who really want me to win."
"And, now mentally, I know I don't just fight for myself. I fight for the nation, I fight for the continents, I fight for the people who love boxing. So, it's just more than that."
We also asked Anthony if he's already considering a fight with Tyson Fury down the line -- but he told us one of the mistakes he made before the Ruiz fight was thinking AHEAD instead of focusing on the present ... and he vows not to make that mistake again.
But, seriously ... if you're hot on IG and you can afford a plane ticket to the Middle East -- might wanna slide into the DMs!!!