Conor McGregor vs. Anthony Pettis -- a match made in fight Heaven -- according to Pettis, who says fighting The Notorious would be a "dream fight" for UFC fans.
We talked to Pettis -- days after moving up to the welterweight division and starching Stephen "Wonderboy" Thompson -- about his next move ... and he says Conor makes a whole lotta sense.
There's just 1 problem ... Pettis says if Conor's actually mulling quitting, fighting him is a very bad idea.
"Man, I wouldn't talk him outta retirement.