Kaoru Fujino voiced Elena in New Generation and 2nd Impact. Mie Midori voiced her in 3rd Strike.
Kan Tokumaru voiced Oro in New Generation and 2nd Impact, while Takashi Matsuyama voiced him in 3rd Strike.
Yuji Ueda voiced Urien in 2nd Impact, while Lawrence Bayne voiced him in 3rd Strike.
Wataru Takagi voiced Hugo in 2nd Impact, while Len Carlson voiced in 3rd Strike.
Effie and Poison were voiced by Kaoru Fujino in 2nd Impact. In 3rd Strike, Yuri Amano voiced Effie, while Atsuko Tanaka voiced Poison.
The announcer was voiced by Bruce Robertson in New Generation and 2nd Impact. In 3rd Strike, the announcer was voiced by Infinite.
Name's the Same: In terms of Makoto's special moves, one of them (Hayate) is named after a swordsman from the Street Fighter EX series. She also shares her name with another incredibly strong female fighting game character, Makoto Nanaya.
New Generation was originally meant to be a full-on retool of the franchise, with a roster strictly comprised entirely of new characters. It was only later in development that it was decided to add Ryu and Ken into the roster. Akuma and Chun-Li would be added to the roster in 2nd Impact and 3rd Strike, respectively.
Gill's original design was to have him manipulate light and darkness. However, Capcom, for many reasons, decided to use the fire/ice alignment to showcase their spiffy new hardware. His secondary color is a reference to the original direction.note He still retains fire and ice control, however.
The development team planned to include Hugo in New Generation, but he had to be Dummied Out due to time constraints.
Shin Akuma might have possibly been planned to appear in 3rd Strike, as he has nearly complete Dummied Out code in the game and can be completely playable with a hack.
Remy's place in the roster could have been taken up by a character that used poisonous attacks, predating F.A.N.G.