Right now I'm thinking of placing my bet on Dortmund cause those big odds could end up coming in for me, not like I feel that Dortmund could win either bayern or real Madrid but you know when ever a small team or rather least expected team gets to the final, the fairly tale story would most likely be finished with the taking the lead and winning the Cup, it's not to bad to place a stake in an unexpected event.
That's why it's called gambling in the first place, nothing is certain so don't be surprised if actually Dortmund do the unreasonable and came out on top of Real Madrid come that final day of play, so I would just tell you some advice which is to gamble on the odd with little funds that won't affect you even if Dortmund doesn't win because the whole world of football expect Real Madrid to win even the bookmakers but sometimes things do change so goodluck.