Of course Leverkusen will still be a threat to Bayern Munich, because after all this team is the team that managed to make them lose the Bundesliga title for the first time after 1 decade they managed to defend it. In addition, Leverkusen also does not have many changes in the line-up and they are still with the same coach who last season led them to become champions in the Bundesliga. That means Leverkusen still has the strength and capital to do the same thing, even though at the beginning they slipped, but it was not a big problem because they were able to return to their proper performance.
Xabi Alonso's men has been playing really well in recent times. If you see the last match, they have played like they were the best team in the Bundesliga. Schick has played extra ordinary in that match. He alone scored 5 goals
. Die Werkself dominated the whole match, they had 67% possession in this match, 20 shots, and 12 of them were on target. This was a greatly one-sided match and I did not expect this match to be so one-sided. Looking at performances like these I agree with you that they are definitely going to give Bayern Munich a lot of problems. We, or at least I thought that Bayern is going to have an easy time this season. But It seems like this is not right. If Bayern makes any slip-up Leverkusen will be there to take advantage of that. And this alone is going to keep both the teams honest.