The scene where Michael demands to be involved in the discussions about Sollozo, to Sonny and Tessio and Michael advises Sonny not to go after Sollozzo 'cause it's "not what pop would have wanted". You can just tell Michael wants to take charge.

It just annoys me how little we saw of Fredo in these parts, he's an underboss and a son of Vito, he wouldn't have just been left out of these discussions, even though his opinion really wasn't worth shit to the other he;d have been there out of respect for being Vito's son.