Actually Capcom tryed with SF III something new and they thought ppl were supersaturated with SF II (to many version were released at that time)so they tryed new chars. And stop telling me and all the others that the main reason were the chars. We discussed it 10000 times here and chars weren´t the main reason this game wasn´t so huge like SF II.
Try something new? I don't think so!
It was a throwback going from Street Fighter to Street Fighter 2. Only a handful of returning characters occured and for the most part, we got to see a fresh cast of characters. I seriously see no problem at that point in time that they wanted to continue the trend of the numeric series but now we got a massive characrter pool to the point that there is no reason not to see more returning characters in the future installments.