DISSIDIA NT UPDATE:
During the stream earlier this morning, we've learned more about the new gameplay mode seen briefly in the TGS trailer, and it's officially named Core Battle. In this mode, you have a colored summon core represented by team color. The first to completely destroy the core (which has its own health bar) wins the match.
In addition, there were snippets of the game's cinematics shown. However, they insist that the game will not feature a traditional story mode fans were accustomed to in the PSP titles.
It's also been confirmed that the UI will be interchangeable, meaning that you can toggle between the UI of the original arcade version as well as the new, less cluttered one exclusive to the console version, dubbed "Simple". Seeing as Japanese players have grown adjusted to the arcade's original UI for nearly 2 years, it seems fair that Square Enix would choose the middle ground to appease both arcade purists as well as international players.