Heard rumors the 4 just announced console exclusive TTT2 characters Angel, Kunimitsu, Michelle and Human Ogre are just 4 of 12 console exclusive characters will even P-Jack make a return?
Sadly Namco itself didnt release character artworks for all TTT2 characters yet but here on Game Art HQ.com http://www.game-art-hq.com/tekken-tag-tournament-2-official-artworks/ you can see all recently published art in Hi-Res and also Screens of the TTT2 arenas. These might be useful as reference i hope
You can also find the official art of:
Mortal Kombat http://www.game-art-hq.com/mortal-kombat-2011-official-artworks/
SF Alpha 3 http://www.game-art-hq.com/street-fighter-alpha-3-official-artworks/
SoulCalibur V http://www.game-art-hq.com/soul-calibur-v-official-artworks/
among many others on Game Art HQ