Would OG Daniel regain all of his memories immediately? Or would he wake up in his original body with amnesia, while his second body falls unconscious and remains inactive until OG Daniel recovers his memories? Honestly, those are the questions that intrigue me the most.

I also like the possibility that the mysterious consciousness inside SB Daniel could take control of OG Daniel's body. Of course, SB Daniel's true consciousness probably wouldn't have any memories, otherwise the secret of the two bodies, and the origin of the second body, would be revealed.

Imagine the OG Daniel from the very beginning of the series: completely inexperienced (meaning he'd probably be even weaker than early-series SB Daniel), with no memories of who he is, waking up in one of the most dangerous places imaginable. Although it's also possible that he'd wake up somewhere safe so he could properly recover from all of his injuries.

Regardless of whether the original body is controlled by OG Daniel's own consciousness or by SB Daniel's true consciousness, he'd basically be like the Daniel from the first few chapters, except with no memories of his own identity. If Eugene survived and found him, at least OG Daniel would get a brief explanation of what was going on.

As for what OG Daniel would do in this scenario, he'd most likely get involved in the fighting to help others, since he's always been portrayed as kind, innocent, and completely free of malice. Of course, I'm only basing this on OG Daniel's personality, I have no idea what SB Daniel's true personality is actually like.

What if Daniel ends up with amnesia because of the fall?