It will not be too difficult for Dortmund to be able to enter the top 4, as it has happened since the past that this team is consistent enough to stay in the top board but they are not competing for the title.
Indeed Dortmund with their new coach will have a little difficulty but I don't think it's excessive.
They have to keep performing well if they want to be able to make top 4 because the league is getting more and more competitive and last season they couldn’t make top 4 which means they have to improve and put in more effort in order to challenge for the top 4 positions. If they bring in more quality players then it will not be impossible, they have signed one of the league’s top scorer for last season Guirassy from Stuttgart which will be a useful signing for them.
Leverkusen and Bayern Munich will still be the favorites to win the title this season and I even think the competition this season will be much fiercer because Bayern Munich made many changes in the team.
And overall the competition in the Bundesliga has been quite fierce in the last few seasons we can see that the Bundesliga is getting more competitive.
The competition will be very intense and on a different level this season, both teams have a young coach which are very talented. Bayern Munich will bring in more quality players and will have the advantage over Bayern Leverkusen but it won’t be easy for Munich again as it were in the past. We could see another team join up the race so in this league now anything is possible.