As for Dortmund, they may do well this season because Leverkusen is always their biggest obstacle every season, so you can see that since they are very competitive and they are rivals, they are not in good shape this season, but maybe it's their turn this season to top the league table after Bayern Munich.
LOL they are what? Only in the last 2 years Leverkusen was a contender. The last time before that they have been 2nd place was in 2011. You people only see like the recent years and not the full picture, that's so funny.
BVB alone was 2nd place 5 times in the past 10 years, think about that. The golden run for Leverkusen is over, now it's back to reality and fighting for the UCL spots (best case scenario).