Champion Cynthia is in the Isshu region and you have the opportunity to battle her once you have beaten the Elite Four. She has the following Pokémon at Lv.75 but one at Lv.77; Spiritomb, Milotic, Lucario, Wargle, Shiburodon and a Garchomp (Lv.77). Also, after defeating the Elite Four, Pokémon from the previous generations will be available in White Forest, such as; Pidgey, Wurmple, Rhyhorn, Gastly, Starly, and Shinx all at Lv.5.
If you're interested in buying one of the TCG "Journey Partner" promo collections, you'll get a code inside that'll allow you to obtain one of the 4th Generation Starters; Turtwig, Chimchar, or Piplup. They have different abilities.
Surprisingly, 2ch has posted a list of TMs that are in the games! Heres the list:
* TM02: Dragon Claw
* TM03: Psycho Shock
* TM05: Roar
* TM09: Venom Shock
* TM10: Hidden Power
* TM13: Ice Beam
* TM15: Hyper Beam
* TM17: Protect
* TM28: Dig
* TM29: Psychic
* TM30: Shadow Ball
* TM31: Brick Break
* TM36: Sludge Bomb
* TM39: Rock Tomb
* TM41: Torment
* TM42: Facade
* TM43: Nitro Charge
* TM44: Rest
* TM45: Attract
* TM46: Thief
* TM53: Energy Ball
* TM54: False Swipe
* TM55: Boiling Water
* TM56: Fling
* TM57: Charge Beam
* TM58: Free Fall
* TM61: Will-o'-Wisp
* TM62: Acrobat
* TM66: Payback
* TM67: Get Even
* TM68: Giga Impact
* TM70: Flash
* TM72: Volt Change
* TM76: Bug Resistance
* TM78: Smooth Over
* TM79: Ice Breath
* TM80: Rock Throw
* TM81: X-Scissor
* TM82: Dragon Tail
* TM83: Cheer Up
* TM84: Poison Jab
* TM86: Grass Knot
* TM89: U-turn
* TM91: Flash Cannon
* TM93: Wild Bolt
* TM94: Rock Smash
Details on thew Elite Four rematches have been added, also there seems to be a new Champion! Also, Looker, from Pokémon Platinum seems to make an appearence in B/W. Details below;
* Elite Four Member #1: Shikimi She has a level 71 Desukan, Burunkeru, Goruggo, Froslass, and Lv. 73 Shanderaa
* Elite Four Member #2: Giima. He has a level 71 Sharpedo, Warubiaru, Zuruzukin, Drapion, Lepardasu, and Lv. 73 Kirikizan
* Elite Four Member #3: Katorea. She has a level 71 Musharna, Rankurusu, Shinporah, Bronzong, Gochiruzeru, and Lv. 73 Metagross
* Elite Four Member #4: Renbu He has a level 71 Breloom, Kojondo, Dageki, Nageki, Toxicroak, and Lv. 73 Roopushin
* Elite Four Champion: Aketu He has a level 75 Agiruda, Baffuron, Kurimugan, Baibanira, Shubarugo and a Lv. 77 Urugamosu