Bayer Leverkusen closed the break in the league well, they've collected 42 points from 16 matches so far, below them is Bayern Munich who are still looming with 38 points and with a 1 match deficit.
Bayer Leverkusen still have 18 matches remaining, if they're able to maintain their performance until the end of the season, of course Leverkusen will break Bayern Munich's dominance and give a new color to the Bundesliga.
Bayer Leverkusen provides a very long distance in points between second and first place. For Bayern Munich, this will provide encouragement to catch up on the points they are left behind, and of course Bayern Munich has an opponent that must be immediately defeated in order to take first place again. As long as Bayern Leverkusen remains consistent and can work well as a team, it will be easy for Bayer Leverkusen to win the Bundesliga this season.
That's not as far as you imagine, mate. Currently the two teams are only 4 points apart, and as I said before, Bayern Munich has a 1 match deficit. If we imagine they win 1 match with that deficit, then the real points gap between the two teams is only 1 points.
A distance of 1 point is not a significant distance, especially for a team like Bayern Munich, so Bayer Leverkusen must remain wary of them, and they still have 1 more meeting next year.