First of all new key visual is revealed:
And new
official site was launched.
But what is most important! We are full SAO now, so beside Yuusaku's profile image:
There is also image for his VR avatar named "Playmaker":
Anyway, Yuusaku is revealed to be hacker who possesses a cool and sharp mind. His ace monster is named "Decode Talker".
There is also "mysterious creature" that persecutes Yuusaku:
More info probably soon as series is set to premiere on "spring".