Other than the three new characters (D.D., Rook and Ingrid) there were other characters from several Capcom games as follows :
Alex ("Street Fighter III
Akira ("Justice Gakuen"/"Rival Schools")
Batsu ("Justice Gakuen"/"Rival Schools")
Nash/Charlie ("Street Fighter Zero
Chun-Li ("Street Fighter II
Haggar ("Final Fight
Poison ("Final Fight
Ryu ("Street Fighter
Strider Hiryu ("Strider
Some characters had alternate colors as opposed to costume color changes. Ingrid, Ryu, Chun-Li, and Charlie all had color changes. The following are the alternate costumes for the characters:
Akira : Orange gloves and knee pads and light blue shoulder pads with desert camo tank top
Alex : Doesn't wear his vest, navy blue overalls
Batsu : dark blue with orange sneakers
Chun-Li : yellow outfit
D.D. : White shirt and red gloves with his vest down
Haggar : office outfit from the Final Fight introduction
Ingrid: Black dress and white leggings (same as Capcom Fighting Evolution)
Nash/Charlie : Red vest and mud green pants
Poison : an all new design including leather outfit and long boots with white gloves and no cap
Rook : Wore a cowboy vest and jeans
Ryu : white headband with grey gi and brown gloves
Strider Hiryu : His costume from the CPS version of Strider
The three new characters seemed to have nicknames :
D.D. was called 'Crimson Thunder.'
Rook was called 'Rebellion Feather.'
Ingrid was called 'Eternal Ray.'
The story was that Death was running around Metro City with a bomb called Laughter Sun. The bomb had codes that needed to be input into the bomb to disarm it. D.D., Rook, and Ingrid where the Code Holders, they had the codes that would deactivate the bomb. Their codes were Ogre, Fallen Angel and Isis.
The game was cancelled because of the negative feedback it got from players. Capcom was losing money at the time, and they even had to cancel two other games as well (Red Dead Revolver, which was picked up by Rockstar Games, and Dead Phoenix)
Ingrid later appeared in "Capcom Fighting Evolution" as a playable character.