Hmmm, it could be interesting, but I have a feeling most people would rather just get to the new content quickly without having to go through some kind of interview. Besides, I have no idea how I would make something believable enough that would have Leto recount each single choice he's made throughout the 1st part of the game at the beginning of part 2.^^
At the beginning of the game, Leto can be in his room, writing in his diary, or sitting on a bench near the church at night, slightly drunk and reminiscing (while Heilyn has sex with Jazon outside the window).
At this point, Leto reflects on how his life has changed since he became a soldier. You can show small flashbacks that will help the player remember the main plot points that influenced the life of Leto and his loved ones. This can be, for example, the death of a commander, a date with Rose in the park, a picnic with Heileen, or events on the beach.
In these scenes, the player is asked to choose a reaction to what is happening. For example, you can show confidence or suspicion in the behavior of girls when they suddenly disappear or return confused. This will help the player determine the ending of the game and refresh their memory of the plot as a whole.
(Sorry for Google - translation, English is not my native language.)