After just hearing Lewandowski's statement, I think Dortmund are going to be severely weakened this season. Obviously the loss of Gotze is going to affect them, but in addition to that, Lewandowski will surely not be as good as he was last season when his heart isn't in it.
For anyone who missed the statement, it was along the lines of 'I still have one year left on my contract, so I have to fulfil it, blah blah blah'. He has told Dortmund he wants to join Bayern. But it looks as if he will join Bayern next summer on a free.
This can only be good for us. Dortmund played some terrific football last season and would've probably beaten us. Hopefully this year, they'll fail in the group stages.