Yea i'm pretty sure that's what happened. I mean in any way the dialogues are being recorded so it means the game is pretty far in developpement but again, i think we all knew at this point. 

Curious to see if the Champions are coming back tho or if the guy is just making the voice of a new character maybe. If they do comeback, it means 3 options : 

1- We will again have memories, which i don't actually think it's a good idea. I want them to leave that in the first one unless it is required to explain something. But the 2nd DLC of Botw really felt like the end of that chapter so i don't see the point tbh.

2- We are going back in time. Maybe they find out the problem and go back in time to kill ganon underground before hyrule gets destroyed. But would be weird for a sequel to go back imo.

3- They get revived but yea that's not happening.

Wait actually nvm, they could comeback as ghost or something. Anyway we'll see. Just hope it's not memories again.

I wonder if in the future, this game sales could be beaten by another game in the series in the future. To me it looks impossible or least, the record will last for a decade easily.