Dortmund last season was superb they did great and almost won the league but this season they're not very consistent and could kill your expectations when you bet on them to win
The last season is not a first time Dortmund earned 71+ points totally for one season. Since 2013 - 2014 season till the past season, they did it four times and the past season, they only earned two points more than two seasons ago. I don't consider it as a super season for Dortmund as they did not earn too much points more than other seasons and eventually they ended as a runner up. In four seasons when they earned 71+points totally, they all ended as a runner up.
This season looks not too bad for Dortmund as they still in a top of Bundesliga and are racing with Bayern Munich and Stuttgart for Bundesliga trophy.
The match between Dortmund and Bayern Munich would definitely be in favour of Bayern Munich even though they're sharing same points currently, Bayern Munich got a better squad and are more stronger and if you judge from the previous meetings 2018 is in a very long time and I don't think Dortmund would be able to win them.
It is big match but it won't decide the league winner as the season is long and many matches are ahead as well as they will also have a second head-to-head match in second half of season. Anyway the coming match between them will be interesting as usually it is a big match in Bundesliga.