Robson said of the former Sunderland boss: "He will be back at some stage, it's in his blood.
"I live around the corner from him and talked to him after he left. He told me that he needs fans behind him and not against him.''
And Robson, currently an ambassador at United, is plotting a management revival of his own.
He has not worked since his failed bid to lift Sheffield United into the top flight ended with his axing last February.
Now he has designs on the Newcastle job if Joe Kinnear loses his post.
He admitted: "That job would be good.''