who is in front after the first matchday ?
St Pauli vs Nürnberg looks like the top game considering the ranking of the last season. This might end in a draw. It is a bit random to look for a best team after one match day, but I think Kaiserslautern and Darmstadt will win their games and potentially taking the lead.
For the whole year, it might be finally the time for Hamburg to reach a spot in the top2 and to go back to the Bundesliga.
I also think that the first matchday should not be judged as too big. The same goes for the next two. Only then does everything slowly start to flow and the teams see where they stand. Besides, there are a lot of changes in the team and they have to come on track first. But St. Pauli against Nürnberg will be interesting. But I find it more interesting how the relegated teams from the 1st and the promoted teams from the 3rd Bundesliga will play at the beginning.