The championship odds:
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Bayern Munich: 1.29
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Leverkusen: 8.50
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Dortmund: 11.00
As a result, it would be a big surprise even if Leverkusen win the Bundesliga this season.

The board would expect ten Hag to finish in top 4 at worst. The Champions League qualification must be a crucial target at this point.
I am sure that Bayern Munich will be Bundesliga champions. Leverkusen will be far behind in the title race this season. I can't see any reason to think that this team is strong this season. Also, I don't trust ten Hag. It is very unlikely that he will build Leverkusen into a title-winning team. Maybe we will see some stable performance from Leverkusen, but I don't think we will see title-winning performance from Leverkusen this season.