An English language article on ESPN - Berlin to host 2015 UCL final - reports
It would be a great time to be in Berlin if it were to happen. The Olympiastadion is a magnificent venue for such a high prestige match - hard to beat IMO.
I am not at all sure what would happen with the ticket allocation for such an event if it were to be held in Berlin. I am quite confident however that it will not be cheap!
No panic in the short term though we've got over two years to wait still!