The Champions League-winning boss has fuelled speculation that he may take on another coaching project, despite rumours that he would retire from football this summer
The 68-year-old coach will be replaced at the die Roten helm by Pep Guardiola next season and was widely expected to bring an end to his managerial career. However, following the 2-1 defeat of Borussia Dortmund at Wembley, the trainer indicated that his time may not yet be up.
"The decision on what I will do after the cup match was already taken last June? Retire? No, you will learn that after the cup final (against Stuttgart next Saturday)," Heynckes told reporters after the game.
A win in the DFB-Pokal final next weekend would complete an historic treble for the Bavarian giants, but the coach admitted his team were not always on top.
"There was pressure on both teams but we certainly felt the burden of being favourites in the first 20 minutes. We didn't get into the game in the first half so I corrected a few things at the interval," Heynckes said.
"Last week in Gladbach was a unique situation, but today I'm over the moon for my players and the Lahm/Schweinsteiger generation.
"I'll be celebrating with my team tonight because they've earned it. I'm sure they'll all let their hair down tonight."
Thomas Muller, however, believes that his current coach will call it a day after a record-breaking season, while he has to worry about bettering it.
"It is hard to describe. I am completely done, I have cramps left and right. But I did not go off the pitch and it paid off. Physically I am over the limit now," Muller told ZDF.
"When you are 68-years-old and you have a record season and then you win the Champions League and have the chance for the treble, you can be happy you are 68 and not 25. Because then you can retire."