The 67-year-old has confirmed Robben will come in for Franck Ribery, who sits out through suspension, while Beckenbauer and Lahm added their sentiments ahead of Wednesday's clash
The France international was dismissed during Bayern's last DFB outing away to Augsburg and Heynckes says Robben is available to deputise in his absence.
Speaking to FCB.tv, the coach said: "There is no need to be secretive about it. Providing he [Robben] stays fit and trains as normal tomorrow, he will obviously start on Wednesday."
The Netherlands international, along with Philipp Lahm and Dante, did not train on Monday ahead of the fixture, but Heynckes revealed he had simply afforded the trio a day off.
"A day of rest will do them all good in my opinion," added the veteran coach.
In the build up to the clash, a host of Bayern affiliates have weighed in on the match.
Franz Beckbenbauer has described the meeting as "a game of football set to fulfill all expectations," while Lahm has claimed, "the whole of Germany is looking forward to it".
The fixture represents Dortmund's last realistic chance of silverware this season with Heynckes' Bayern currently sitting 17 points above Klopp's charges at the summit of the Bundesliga.