Yes and no.
UFC has done great in Sweden, believe they set the Fight Night gate record with like 2.5 mill. Think about this, that FN in Sweden did a higher gate than Jones/Gus did in Toronto.
Bring Gus/Jones to Sweden after their epic fight and teh fact Sweden only gets one event a year they would def do a huge gate and sell alot of tickets.
The only downside would be the timing and PPV in the US.
Thats the only reason Europe doesnt get big cards and huge fights. If the time was better they would easily get huge fights because the UFC can sell tickets and do big gates in Europe with average cards, you bring big cards with huge fights they would do better gates than they do in the US, minus the few huge Vegas cards.