Last season Leipzig competed for the Bundesliga title but unfortunately in the middle of the season they were not very consistent. Talking about top competition, I think it is still too early for Leipzig to be able to match Bayern Munich, even though in recent weeks they have consistently won, but just like last season they will always experience inconsistency.
Maybe it's clear and it seems like you also understand that the top competition will forever belong to Bayern Munich and Dortmund (even though we also know they can only finish in 2nd place in the end). I think on the contrary, as long as a team continues to consistently achieve wins rather than defeats, so far the team will still be good and I think Bayern Munich will be fine this season.
If you look at Laverkusen, I think Xabi Alonso squad is worthy of being on the list of contenders for the Bundesliga trophy. Together with Leipzig and Dortmund, Laverkusen will compete to break Bayern Munchen dominance this season. I predict Laverkusen that the most worthy to challenge Munchen, the draw between the two matches makes me sure of that. Meanwhile, Dortmund, which finished in second place last season, has not shown promising performance, overall the competition for the top position in the Bundesliga standings will become very competitive with the emergence of Laverkusen.
If we don't experience a storm of player injuries, I think all clubs will remain stable, the consistency of performance is largely determined by this fact. Even though Munchen remains the main favorite, it is possible that Munchen will be displaced from the defending champion.