Maybe some unexpected 3rd party might come and intervene, thus helping Setsuna and Marina escape. Cause I can't imagine Ali letting them go unscathed just like that...him being such an evil murderous psycho as he is.
Since the other Gundams are still busy at the Kataron base...what if let's say, Nena appears? I'm sure she still has a score to settle with Ali for what he did to Mihael and Johann. Maybe Liu Min would have sent her.
Just my speculation.
