Retranslation of the 'leak'
My wife is Taiwanese, so just in case I asked her to translate the leak to double check some things. You can read it below. Chinese is notoriously open to interpretation, so some parts were a bit wack for her.
The new character has multiple weapons. And Ryu has only one weapon, the katana. But he has many different katanas that he can use. (translation as she explained is he will thus have multiple katanas that are the same, but look different, so either skins or maybe rpg-stuff)*
She goes on to note that the entire project is created and directed by Platinum Games. That it uses their inhouse engine, and that Team Ninja's involvement is basically zero. The only gave them the animations for Ryu.
At the VERY beginning of the project it was only a sidestory, but when they added Ryu they felt it should be a full sequel.
Want to itterate the part about the katana was difficult to translate due to the kanji usage. She gave the example of holding 3 bottles, and said "Ryu only has the blue one, but he has many blue ones"
I can't imagine there's more than one TDS, so when I said "so he can change katana to one that's the same, but looks different" she said yeah that's the most likely interpretation.