Ok i am 99.99% positive that's Linda Young. It's clearly Linda Young in the trailer that iconic laugh is unmistakable.

Baba Yaga's actual in game dialog is questionable? Pretty sure it's her still but she went another way with the voice, and I have to wonder why.

For those who don't recognize the name Linda Young is inarguably the best english voice of Frieza, and the voice of Genkai on Yu Yu Hakusho, among other things.