I think the idea is interesting, but in execution I don’t see how you could integrate any of the video game footage into any of the films without the switch being incredibly jarring.
What makes you say that?
The difference between film quality CGI/models and video game CGI is still rather large. Say nothing of the live action people and environments to CGI.
The movies already have plenty of CGI (the more recent, the more CGI), and it looks fine. As long as you’re not using CGI humans, but even then, Leia looked perfect in RO.