1. Manchester United/ Chelsea/ Liverpool
2. Real Madrid
3. Juventus
4. Wolfsburg
We can get such group if we're in pot 3.
Of course, being in pot 2 won't guarantee an easy group. We can get:
1. Manchester United/ Chelsea/ Liverpool
2. Juventus
3. Atletico Madrid
4. Wolfsburg
The difference is Real Madrid vs Atletico Madrid.