Dortmund and Leverkusen won't pose a serious threat to Bayern Munich this season, as neither team is yet on par with Bayern Munich in terms of strength. However, if we look at the details, Dortmund might be better than Leverkusen this season, although Dortmund won't be able to break Bayern Munich's dominance this season, as Munich remains quite solid with the depth of their squad. I wouldn't expect anything less from Leverkusen or Dortmund this season, as Munich will never neglect any opportunity to win this season.
This si aa point of view I will support, Bayern Munich is currently on a very different level as compared to others. Leverkusen who we were hoping to be the threat Munich will face has turned out to be a weak team now with their performance meanwhile Dortmund is still looking very much average in their performance so far and they do have this style of no pressure and doing only as much as they can do at a time. I will even suggest you drop your expectations on Leverkusen because they may disappoint due to the performance they are putting up now.
We shouldn't hope on Leverkusen any more because their days of disturbing Bayern Munich are over, they can't do anything to stop the champs this season with the fact that they are losing good players with the manager as ETH I don't see them finishing second this campaign. Same goes to Dortmund, they are not close to any club stopping Bayern Munich because the only thing Dortmund are good at is grooming good players and sell them without using them to win any trophy, at least use these good players and stop Bayern for just one season, but they can't, too bad.
Any person who is hoping that Borussia Dortmund and Bayer Leverkusen will stop Bayern Munich from winning this season's Bundesliga title is dreaming, and the person should wake up from his dream. Bayer Leverkusen and Borussia Dortmund lack the squad depth to win most of their matches this season, so they can't rival Bayern Munich for the Bundesliga title
. I am even seeing Bayern Munich to win this season's Bundesliga title with a lot games remaining for the Bundesliga season to end.