I wouldn't even dare to hazard a guess, because we still don't know how or if the third and fourth films will somehow play a part in this.
Someone around here proposed maybe random clips from them both, as a segue into showing the dream-recording device from 'Prometheus' being used to try and learn from Ripley's memories. That'd be valid. But, again, that's if they go down the route of canonising them as dreams.
This. And Angelina Jolie, of course, because well... Angelina Jolie.