A few info:
Reiko Nagase is back (we knew it)
There will be a new World Race Mode which will feature 12 cars races and there will be 24 tracks with a few revised from past episodes in the series.
Plus the game Rally X (1980) from Namco will be playable as a bonus since the beginning of the game.
Wi-Fi Lan duels are confirmed and technically possible up to 12 partecipants,even if Namco thinks that 3 to 4 players duels will be the ideal situation.
Edit:New infos added.