The "prologue" sounds like the Char. Creation part with appearance and class choices to be made. But the dialogue part is interesting to me. Does this just mean we will be picking our voices? Or are we actually going to be talking to ppl in the prologue? Cuz that would make it semi-playable prologue.
I was imagining it sort of like Skyrim - occasionally an NPC will ask your PC a question that relates to your background, and you choose the response that fits the backstory you have in mind.
For example, the NPC says says something like, "What about you, are you close with your parents?"
And your dragonborn can respond, "Yes, they're very proud of me," or "No, we don't get along," or "I don't really remember them," or "They're dead."
In the case of Skyrim it doesn't really affect anything except the NPC's next response to you, but I could see that being a way of allowing you to make some subtle decisions about your origin without a major origin story or detailed background in the character creation.