If Vito hadn't passed on when he did, how much longer would Carlo have gotten a pass? Plainly Vito knew Carlo would have to go. Would Michael have felt constrained from handling Carlo as long as Vito was alive just to spare Vito's feelings?
Yes I agree, Vito knew Carlo had to go. But I also think even Vito knew his time was running out. You can tell this when he steps down and makes Michael head Don. Vito even mentions that hes drinking more wine! lol. Its little hints such as those that make you wonder.
But hey! Thats just my theory.
