The game between Leverkusen and Real Madrid in the next season the Champions League is something we are going to maybe see in the race between Ancelotti and Xabi Alonso.
But the fact about this match is that's still far. While I think we should first talk about the game between Real Madrid and Dortmund which is something we are going to see soon.
There is no UEFA Super Cup match between Real Madrid and Bayer Leverkusen because they both need to be champions in Champions League and Europa League. We know Leverkusen failed in Europa League final by Atalanta and only Real Madrid can have a chance to play that Super Cub match. If they are there, their opponent will be Atalanta.
I don't know what race between Ancelotti and Xabi Alonso you want to say here. Xabi likely wants to get a coach position at Real Madrid but he has to wait for Ancelotti to leave that position, to step down or be sacked. Two coaches will only meet each other in actual matches if two clubs will be drawn in a same group next season and for now, we don't know it will happen or not.
I know Dortmound's chance is really low against a team like Real Madrid but seeing them play in the Champions League final match is something we couldn't expect and it's more like a miracle, that's why we should consider the chance for Dortmound to even win this match.
If Atalanta can beat Leverkusen, I see Dortmund will feel their chance in the final match with Real Madrid which is not too big but not too small. Real Madrid are stronger and more experienced than Leverkusen in such final match and with their coach, Ancelotti, they will have good preparation for the final, from training, tactics to warnings to wake up players and eliminate any underestimation and arrogant against Dortmund before and during the match.
I believe experience of Real Madrid and their carefulness will reduce chance for Dortmund to make a shock.