Carlo Ancelotti is one of the most successful managers of all time and has won several UCL trophies for Real Madrid. Although the final match is very difficult for Real Madrid in other seasons, this season at least the final match will not be so difficult for Real Madrid and maybe this season Real Madrid will be able to plan the final match very naturally. Of all the players Real Madrid have, if Carlo Ancelotti drops his preferred XI, Dortmund won't do much against this team. If the final match needs a lot of planning, I'd say Dortmund needs to plan. Real Madrid has multiple strikers and the midfielders of Real Madrid play a lot of attacking football, but it is a very big question which midfielder will be tagged by the opposing defenders or which striker will be tagged.
I certainly wouldn't say that this match, with any of the lineups for the match, will be easy for Real Madrid. This is the Champions League, especially the final - unpredictability is the key word that should be used here. Dortmund may well win this match, yes, it will be incredibly difficult, but theoretically it is possible. I will be rooting for them in the final, Real are boring to watch in this tournament, they have won it a bunch of times
Ancelotti is game strategy expert and can really understand what must be done for Real Madrid line-up in the final match, I believe that Real Madrid game will be really very strong and they can have stable performance both on the front line and in the defense.
Maybe Dortmund can also be called strong team because it was able to eliminate other team that were its opponents until Dortmund actually managed to enter the final round, it just that all of Dortmund opponents were very different from Real Madrid.
In the final, I think Dortmund will be much more careful and prioritize being able to focus on their defense because all of Real Madrid attacking players always perform very well with solid cooperation, it will be easy for Real Madrid to get goal advantage if Dortmund defense makes mistake.
Of course Real Madrid is the favorite, and they are the team that is superior, hopefully the UCL final match will not be like the Europa League where an unexpected surprise occurs which makes the favorite team suffer defeat, but the chances are very small for Dortmund to show big surprise like that.