TBH, i expected to be Thancred and Unukalhai from the begging. I haven't forgotten about Hydrus Van Regula neither, he would be possibly the only one able to make Varis face the first emperor along the alliance instead of the route he is going on right now.
Maybe if we are truly going to re-write story, a good start would be to save Hydrus if he is not already alive and doing something about things just as Gaius was.

I don't even know why is minfilia back. Aether is thinning, Hydaelyn is probably at its weakest now, like, can she even be bothered to manifest on a younger minfilia once more? a clearly Aether "infused" one. Wasn't she busy saving one particular Shard to begin with? Even in an interview they said that the whole Warriors of Darkness and Minfilia stuff was done to get rid, break away at least, from the chains of 1.0

I honestly do not understand the incessant need to bring people back alive... This is just bad writing. And before you point out i want Hydrus back, Hydrus was wasted as a character unlike minfilia we all know, had more than enough from and most were pretty glad to see part. I really don't understand what is minfilia doing in that trailer, at all.