Yeah there is no way it is a 50/50 chance. 
Just look at the odds in the first place.
However would I like to see Dortmund as the champions? Hell yeah!
I indicated that already before and I think people except Real Madrid fans wouldn't also say no to seeing a different champion. Real Madrid have already been dominating the Champions League with 14 titles you know. If Mbappe joins them as well then it is more difficult to beat them out of the tournament. Therefore I hope Dortmund make it this year. 
Just look at the odds in the first place.However would I like to see Dortmund as the champions? Hell yeah!
I indicated that already before and I think people except Real Madrid fans wouldn't also say no to seeing a different champion. Real Madrid have already been dominating the Champions League with 14 titles you know. If Mbappe joins them as well then it is more difficult to beat them out of the tournament. Therefore I hope Dortmund make it this year. Even as a Real Madrid fan, I admit that it would be good if we saw more different champions and the fight for the title was more diverse than every year with less than 10 teams claiming it and playing among themselves.
But the presence of such cheaters as City and PSG in the competition makes me think that it will be good if Real continues to cement its superiority over the rest, so that these upstarts can always be shown their place.