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.
I can't say anything for sure about Dortmund yet, but it's hard to say for Leverkusen. Bayern Munich is a balanced team in the Bundesliga who have a high chance of winning the title this season and if nothing happens, Bayern Munich will probably win the title. Because in terms of team strength, no team is close to them and it is not possible for any team to threaten Bayern Munich. But it is not the right time to make predictions and it is too early. For Dortmund, it will be possible but not easy.