Picking just one character I'd like to see most out of all the FFs is tough, I'd like to see some of the less straight up fighters make it, like Vivi or Red XIII (just in the sense that they are different physically).

They should bring Genesis

Jump previously confirmed Kain and Lightning for the game. There will be more characters than just this -- a lot more. The new character count will be beyond the level of 3 or 4 characters.

Famitsu confirms that all the characters from the original will return. All the maps from the original will also return.

Updates for the current crew include a 3P color. The game will also have new summons.

In the previous leaked info below, there was mention of an Assist Mode where you can call out an allied character into battle, resulting in four characters fighting for brief moments. It does not look like the game will have four player support.

During Assist Mode, you can issue commands to your ally. Pressing Down L and Circle depletes your assist gauge by 1 and makes the ally do a Brave attack. L plus Square depletes your assist gauge by 2 and makes the ally do an HP attack.

Square Enix is keeping details on the game's story mode under wraps right now. It appears that the 012 in the name has something to do with the story, but it would be a spoiler to get specific.

Some of the new gameplay systems are also being kept under wraps at present. One of these systems is said to be as big as surechigai/tag mode, but different. Some of the game's secrets may come to light for those who play the game's Tokyo Game Show

Regarding music, we can expect a whole lot more background music this time around. Nomura also appears anxious to include the original Famicom chip tunes in the game.

The wait to play the Dissidia sequel in final form will not be too long, Nomura also confirmed.

Well I'll never be able to play it but characters I'd like to see are:

Locke, Red XIII, Zell, Yuna, Balthier, Fang