Beckenbauer, who captained Bayern to European Cup glory in three consecutive seasons during the 1970s, believes that the line-up manager Jupp Heynckes will most likely field in the showpiece at the club's own Allianz Arena will be "crazily attacking" and "unpredictable".
The man who led Bayern to the Bundesliga title as manager in 1994 also worries that star central midfielder Bastian Schweinsteiger will not be fully fit for Bayern's second Champions League final in three seasons this weekend.
Writing in his column for German newspaper Bild, Beckenbauer said: "I assume that (Thomas) Mueller will come into the starting XI. With (Franck) Ribery, Mueller, (Arjen) Robben, behind them Schweinsteiger and (Toni) Kroos we would have a crazily attacking midfield. But perhaps also a somewhat unpredictable one.
"With Schweinsteiger you sense that he is still not 100 per cent fit after his injury."
Bayern did not have the ideal preparation for Saturday's final last weekend, when they were beaten 5-2 in the German Cup final by Borussia Dortmund, the same club who last month had beaten them to the Bundesliga title for the second year in a row.
"Despite the debacle against Dortmund, the Champions League final is not lost by a long shot," Beckenbauer said. "And I would not like to imagine that Bayern will be without a single title at the end."