I'll respond in english so also danish people will understand!
MMA has been accepted into the Swedish Budo-association and is therefore goverment sanctioned but untill recently they've had some different "more safe" rules. Very recently though they got permission to use international MMA rules in order to attract international promotions like the UFC
The UFC will fill any 15k-20k stadium in the contry EASY. People from Norway, Denmark, Finland, Estonia, Germany will also make the short trip just to see a live UFC event.
I really hope they do decide that Sweden is the best option for the 5th Nov show.