Polanski's Film Version

In William Shake Speare's version of Macbeth the play ends in a speech from Malcolm about mseeing him be crowned king. But, in the Polanski's film version of Macbeth the play ends with Fleance ridinng through the rain going to see the witches. I have a couple of predictions as to why Fleance was riding through the rain to see the witches. One, prediction I have is that maybe Banquo told Fleance before the incounter with the three murderers to see the witches. Another prediction I have is that Fleance was just curious to know what shall become of his future. Maybe, Fleance went to the witches to ask about would he become king one day and if so how. Fleance even proably went to the witches just to see what be came of Macbeth in the after life, after he was killed Mac Duff. Fleance proably wanted to know what be came of Macbeth in the after life because he wanted some thing really really bad to happen to Macbeth after what he did. Maybe Polanski wanted to make it where it was the same situation all over again showing a circular motion of everything. In which case I mean how when Macbeth and Banquo went to see the witches that way the witches could tell both Macbeth and Banquo about their future. Maybe, Banquo told the Fleance after Macbeth was killed, because Banquo proably knew that Macbeth was going to die because of the horrible crime he comitted because he wanted power. So Banquo wanted Fleance to see the witches so the witches could tell him about how he shall become king.