Before you all crucify me (I know this topic has been heavily debated before) I was just wondering if Michael knew he was going to kill Fredo when he made up with him at Mama's funeral. My guess is yes, with the way he looks at Neri as he hugs Fredo, he did know he was going to have Fredo whacked, but he did that for show so no one would be suspicious later.

Or did he decide at a different time that Fredo had to go?