First up we have a screenshot of the game's character select. There look to be five blank spots in this picture. It looks likely that the game will have more characters, with a possibility of having around 30 characters in total.
Below are screenshots from Japanese website Denki Online. If you hit the soure link below, you will also find artwork for many of the characters in the game. It shows some more of the game's new stages. This is a personal relief, as KOFXII was horribly devoid of stages. I also like how they have somewhat borrowed the BlazBlue color select. It gives the option to add more color schemes to the game and gives them more freedom to more color choices without being hamstrung by mapping one color choice to a button.
Now please get some good net code. GGPO is right there if you need it. Just a suggestion.
Thanks to Jaguar131 for the tips on the screenshots.
Source: Denki Online