If Leverkusen can be able to hold on and get a point against Munich, then they can go the complete season unbeaten, and their chance of winning of getting point against Bayern Munich is high because they collected four points against Bayern Munich last season.
That will definitely be Leverkusen's next target against Bayern Munich and in fact they know that winning against Bayern Munich is quite difficult. The first meeting against Bayern Munich only ended in a draw and it is possible that in this second meeting the result will still be the same. But it is quite worrying if Bayern Munich wins and at that time Leverkusen will start to be overtaken.
Bayern Leverkusen has really done a great job by remaining unbeatable in the bundesliga so far and with the enthusiasm that this players have shown in most of their matches, I don't think they would face much problems in their match against Bayern Munich and for the fact that they played draw in their first meeting at Munich's home ground will make Leverkusen to also hold on to same fate as they welcome Bayern in this returning game in Leverkusen home ground so I believe that though the match will be very difficult for the both side due to the fact that the both clubs are the possible title contenders so any of them that loses to the other might slim their chances of winning the bundesliga so if Bayern Leverkusen still wishes to maintain this awesome performance that they started with then they need to at least hold Munich to a draw or better still win them so that they can be more confident of their bundesliga debut.