Alternatively, extend the scene of Daniel crying. Overlaid with pictures of real life crying toddlers...
The problem with an extended cut, as I understand it. The scenes would need to be animated. They don't exist. Which wouldn't really mesh. Any additional dialogue then becomes an issue. Since a lot of the Sunbow voice cast are deceased. For example, I'm sure the envisioned Gestalt battle of the Ark would have had talking.
The Justice League Snyder Cut has really put daft ideas in people's heads