I'm planing about which technique is most suitable for my project. Three-dimension would be a great choice for my future because I would understand better in unfamiliar field. Anyway, it will come with a ton of pre-production jobs.
After have a discuss with Adam, I found that a crowd in the animation is a big problem. I need a least four extra characters for those shots. However, he said that I could solve the problem by repeating a same character for the citizen. It depend on the design and style which will be used. This problem may affect the design direction.