I'm not sure if it's possible yet but if this happens and Leverkusen really stays in the first place in the Bundesliga and wins the title, they can make history because Bayern Munich was the team they were winning the league for ten years now, but a team like Leverkusen can break this record while they got less budget than Bayern Munich.
They have that opportunity and they shouldn't waste that opportunity like what happened last season with Dortmund, but as I have said, it is also no less important for Bayer Leverkusen next season because it means they will not only play in the Bundesliga but also in European competitions and higher than the Europen League namely the champions league, how do they maintain to perform well even though they are not able to defend the Bundesliga title but are still a team that plays well not only one season is impressive and then very disappointing after that, and Union Berlin is facing something like that, indeed they were not champions last season but they could be being in the top four is a good achievement but this season they are one of the worst teams in the Bundesliga and do not show in the slightest that they are a strong enough team last season when compared to the results this season.