Juve, City, Sevilla, Gladbach is pretty deadly to me. I'm assuming that's one of the 3 you listed.
That said, I was looking at the teams out there before the draw and it's amazing how much quality there is. Are teams like Eindhoven, CSKA, and Shakhtar a given? Not even close. I'd say there's about 2-4 truly hopeless teams which is great in a tournament of 32.