The hooded cloaked figure is Sin and Doryani wants the Beast.

Here's my take on what the possible storyline of POE2 could be. The hooded cloaked figure in the cinematic is Sin, and he's been growing another Beast, possibly from the Dark Ember taken from the original Beast of POE1. Why he is creating another Beast is uncertain. What I think is that Doryani knows Sin has a mini-Beast and he wants it. To this end, the Count has been manipulated somehow in obtaining it for him.

Why? It might have something to do with the Cataclysm that ended the Vaal civilization years ago. The original Beast was known to have caused cataclysms in the past. The Beast was also known to have been manipulated by Doryani. I think Doryani was using the Beast to grant immortality to the Vaal but instead the reverse happened and the Vaal civilization ended. Now, Doryani wants to bring back the Vaal using the new Beast.

I'm almost sad Acts 4-6 won't be ready yet for play as I'd like to see how the storyline plays out. I hope there are no spoilers in endgame that reference the conclusion of the storyline and the aftermath.

The evidence I have is flimsy, but here it is:

In the cinematic, the Count mentions that "your kind no longer rule this world". A reference to the gods killed in POE 1 perhaps? The gods of which Sin is one.

The hooded figure uses words like "humanity" and "mortal", just like Sin does in POE 1.

There is one more piece of evidence, but it's a possible POE 2 spoiler so I won't mention it here.

I hope not. Would like story to have as much totally new fresh characters, especially core ones, as possible.

He doesnt sound or talk like Sin. My first thought was that it was the Envoy or something like him.

except for one key detail mentioned in poe1 , only the player character can see sin, i think the blind dude in act 3 can feel sins pressence later , but appart from that noone else can see sin

what i find more intriguen is, that the hooded figure got stabbed, but didnt die, and the sword shown in the trailer was of kalguuren make because of the runes

i think it is a figure we already know, that much i agree, but i doubt it is sin

also dont get fooled that whoever it is, is a good person, in the end it is poe and someone helping you from start to end without any evil intentions is not realistic in that universe

Its also possible that Sin´s daddy "Grumpiness" is finally back from
the long fetching a bottle of milk quest from around the corner.

the cloaked figure is good guy right? becuz we see him as vendor npc later

I bet its actually innocence and he became the hooded one as a form of penance for his sins at the end of poe2.

It could also be sin, because he is the father of the first beast but that is less interesting.

Or he could be yet another god. we did not kill them all at the end of poe1, just the belligerent ones that got in our way.

that would be even lamer

Ah yes, it's less interesting because it's bad to have throw back to the original even though it's a sequel that take place only 30 years after POE1.

lol

the voice of the hooded one sounds very much leaning towards innocence it feels like hes impersonating sin, specially the words he chooses and things like that