Seeing the strength of the team I am a little doubtful that the team will be able to put pressure on Bayern Munich especially Leipzig and Leverkusen who did not make major changes to become better, Leipzig did not make many changes and Leverkusen made a lot of changes so I think it is very likely that these two teams will not be better than last season so Bayern Munich next season is very dominant in my opinion and most likely they will defend the title easily.
I would guess that, while they will not be able to put pressure on Bayern Munich probably, it is also possible that those three could be the teams in the top four. Obviously things change all the time, and we have no clue how the top four will be, but they are pretty decent teams.
I have a very little doubt that Dortmund will be in top four, they look like they built a team and got a manager who will get them into top four. Other two, Leipzig and Leverkusen, could be doubtful and we need to wait and see how they move. That is the most important part because betting will change according to how they do. I do not start betting huge amounts until week 10, I bet like 10 dollars per game (or parlay) until then. But afterwards, we will see how teams are doing.