This is not really a thing. Hence the "may", which is really a "won't".
Caroline Miousse and the peeps at UbiSoft Montreal did an amazing job of recreating the interior of Notre Dame in AC: Unity, yes. Apparently it was the work of two years, and the result was spectacular; for all its launch-date flaws, Unity's visual fidelity was outstanding and a testament to the work of Miousse and her art team. With that said, nobody is actually pushing this idea except for r/gaming. (It has been widely mocked on, say, a certain other subreddit.) Notre Dame's reproduction in a video game environment was an impressive achievement in the context of video games. But the reconstruction authority has literally millions of images of the cathedral created over the last several centuries to source the layout of the cathedral. Nobody official has said anything about Unity being used for obvious reasons, so all of the news articles suggesting it are effectively unsourced. Another example of social media creating its own news cycle out of vapor and dust.
It seems likely that the precise laser scans of the late Andrew Tallon, Hannah Groch-Bagley, and their group of art historians would actually be used by the reconstruction authority. Such scans would be significantly more useful for architectural purposes, being fairly exact and specific measurements. And unlike Unity, the scans provide information that we didn't already have before.
To be clear, it doesn't seem like anybody official has evinced much interest in these scans yet, either. That, too, is pure speculation. But based on its own merits, it's more likely than using AC: Unity.
