A lot of people say the game feels great.
CHARACTERS
So, we have
SS
Hanz, Galford, Jubei, Uky, Nako, Hamaru, Charolette, Tamtam, Kyshir, Wanfu, Gen An, Amakusashir Tokisada [everyone except Assquake]
SSS
Genjur, Nicotine, Mizuki [everyone except Chamcham, Kuroko and Sieger]
Zan, Ten Samu
Rimururu, Shizumaru, Basara, Gaira, Zankur, Sgetsu, Kazuki [everyone]
SS0
Yoshitora, Unpi, Mina, Ged, Rasetsumaru, Rera, Suijasama, Enjatan, Sankur, Yumeji, Kygoku Hinowanokuni Ga [everyone except Poppy]
Original
Matsuribayashi Sugoroku, Andrew, Karakuri Ochamaro
Thats quite a lot of characters. 36 ? What the eh.
There are still some unused boxes, but since some characters like Amakusa and Ga were CPU only, we may have the count ? Maybe 1 or 2 characters left ?
Also, there is a random. And Kuroko should be there.
Ochamaro
Comes out of a box like an automat. Cute. His voice reminds Ojamaru.
He has a move that reminds of the rekkaken (follow up).
Throw ( ?) where he transform the opponent in a doll and make him dance. Extra cute.
His bukitobashi makes him wear a mask like those dances of the lion and run forward.
Extremely cute.
Nicotine
Copipe from SSS. He has a new move where he creates an image of himself, which allows to create traps with the overhead (like with Jojos stand).
Mizuki is also a stand user now. (or maybe a little like Chizuru ?). Her nail move changed.
Yumeji
Nearly only new moves. No more morphings. Something like Moriyas oboro, takes a pose then issen. Her tsubame kaeshi is like Ukys in SSS, with the tsubame flying. Also, its slower. In the CPU demo, she composes tanka poetry. New voices, but same VA.
GenAn
Not a lot of reports. He has at least the triangle jump. I think hes also copipe-d from SSS, but Im not sure…
Zankur has a new crouching slash, and 2 new moves.
Gas dash move (I think?) is shorter, but has a new follow up. Also, his mirror move can hit the opponent.
MODES
Like Banch said, the full list of modes are ? (ken) ? (ikari) ? (shin) ? (zan) ? (ten) ? (zero). One mode for each game.
? (Shin)
The E button has all the D moves from SS0 except 6D. Big offensive power. The character pauses when his ikari gauge is full, like in the first games. The bukitobashi destroys the weapon, which takes some time to come back on screen (not as much as in SSS, but still). Doll transformation ?
? (Zan)
E = evasion, close 6E = that weird dance where you go in your opponents back.
In air, E allows you to air guard. It feels like a blocking, its very hard to use for now.
AB allows you to charge your gauge. Big offensive power ?
? (Ten)
E has the same properties on the ground as Zan mode.
AB allows Samurai Combination, at least AAA, BBC and AABBCCC. THE 14 slash may still be here, but the command hasnt been discovered yet. With the 8 slash move, half of your gauge will fill, so the full combination should fill it completely.
ABC ikari bakuhatsu, ABC issen.
Like in TenSamu, when you ikari bakuhatsu, your ikari gauge will be longer if you have fewer energy. The power of the issen depends of this as well.
? (Rei)
E = D moves in Zero. AB = meditation. ABC = ikari bakuhatsu. DE mu no kychi, ABC issen. The Kychi time depletes even faster than in Supisupe.
The Higi and mikiri slide are only for?(ken) mode. The mikiri allows to charge your gauge for the higi.
The damage has been fixed from the last time. The strong slash deplete energy like it ought to, which means A LOT.
The issen is cool, the screen turns white and the characters are only shadows like in Hibikis move.
There is no death, and not even blood.
For now, the last stage is one of Supisupes 4 bosses (random ?)
For a reason, the normal throw is harder to do than a command throw like the mozu otoshi.