Analysing statistics such as form after such a long layoff is useless. Corner statistics are worth checking out.
All teams are in training for 5 weeks or more so I don't see any advantages there for any team.
I will also take a look at the high range odds like Werder Bremen, Hertha and Mainz. I will definitely not bet on straight wins for Bayern, Leipzig and Dortmund because of the low odds offered.