I agree with you that Bayern wouldn't do much in the Champions league next season because Kompany hasn't really focused on the UCL competition last season but was more focused on lifting the Bundesliga title. The same might repeat itself next season. Liverpool looks promising because they have the squad to go far in the competition, but nobody knows if they can. Injury can also be a barrier to these strong clubs which will lead to underperformance.
I don't think you supposed to agree with that, Kompany is preparing his team for the Champions League, obviously their domestic league looks farmed already since Leverkusen are busy letting go of their potential squad and Dortmund still struggling to live upto expectations, Bundesliga title will be retained another season for Bayern.
Bayern won't win Champions League but they will do well, Liverpool are also good contenders alongside Manchester City, Barcelona and Real Madrid.