If Leverkusen gains points and Bayern wins, Kompany's hand will be very strong. Bayern will gain a significant advantage. Dortmund is a difficult away game. If you remember, Bayern also lost 2 points there and scored the equalizer in the 85th minute. If Leverkusen loses points, I think Bayern, who have gained this momentum, will not give the championship to any team for the rest of the season.
Bayern Munich's next five games will face slightly easier opponents than Leverkusen who will face Dortmund, but looking at Leverkusen's current form I doubt Dortmund can get a more favorable result. Leverkusen will definitely not waste the opportunity and they will definitely fight to win the game so as not to have such a big gap with Bayern Munich. The competition will be even tighter if both can maintain their positive trend and maybe the points difference can be much closer when they meet later. I think Bayern Munich needs to be wary of Leverkusen's revival even though at the beginning of the season they did not appear so impressive and now they are starting to show something better.