i think it wont be too much for clubs to decide they dont want him because hes too expensive and still enough for Dortmund to make an excellent profit. somewhere between 50 and 70 million i guess.
i wonder where he would go. Barca cant buy, Bayern seems to not ant him (but i wouldnt be so sure about this), Real is overstacked at the offensive positions (they are still an option but Ronaldo, Isco, James, Bale, Jese and Reus too?.. too much), from the EPL i could only see him at United and MAYBE Chelsea. will be an interesting summer for him