Yes, this match will definitely be interesting. Although Dortmund has lost to Real Madrid in its last few matches and in the domestic league Real Madrid lost to Barcelona, it does not mean that Dortmund will be easily defeated by Barcelona. Dortmund this season in the UCL league has performed impressively, they have only lost once, this is the same as Barcelona who only lost once and both teams have collected 12 points.
The UCL match on December 12 will not be easy for any team. Maybe in this match football fans will enjoy a tough and exciting match. Barcelona have consistently beaten the opposition in recent times, which is why many would consider Barcelona as favorites in UCL matches. Barcelona and Borussia Dortmund have lost just one match this season in the UEFA Champions League. In this regard, the performance and strength of these two teams are almost the same.
Dortmund in this match certainly will not repeat the same mistake as when they lost to Real Madrid, they do not want to lose a second time when facing the Spanish representative team. Moreover, this match is played in front of their own supporters, this will be an opportunity for Dortmund to get perfect points.
Borussia Dortmund lost by a wide margin against Real Madrid, they had a very poor performance in that match. Since Real Madrid was beaten by Barcelona, this match might be more difficult for Borussia Dortmund.
I myself will predict that this match will be won by Dortmund and another possibility is that this match will end in a draw.
You can't say for sure which team will win, this match between Barcelona and Borussia Dortmund has the highest probability of a draw.