Wait For it    
    
  

  

  

  

    
    This might be hard to take    
    
  

  

  

  

    
    Are you Ready?    
    
  

  

  
Snape kills Dumbledoor

For some odd reason, you meet Juniper for the first time, and the first thing she does is give you a Master Ball. At least you don't have to wait.

The Tower of Heaven is still there, but Skyla will be ready in her gym when you first enter the city. I'd still go there, though. Pre-gym training and Juniper's waiting with a Lucky Egg.

The move-house has changed location to the World Tournament. Move Deleter, Relearner, and Starter Guy are found in booths.

For easy organization, you can select which kinds of items you want to see when you open the Convenience Pouch.

Twist Mountain and Tubeline Bridge are blocked off, so it seems that the postgame areas are Icirrus City and the routes it's inbetween, Black City/White Forest and the Route with the Relocater, and anything before Skyarrow Bridge. Route 10 has also been taken off the map.

The Kami Trio can't be caught in the game, and the house where you get the storms to activate instead shows you what they are, so you can put them in the Pokédex.

You get to fly in a Cargo Plane to a town west of Undella, and that's where Rebirth Mountain is found.

It looks like they replaced the rich people's house with the underwater bridge that was seen before. It links Undella Town and Seigaiha City.

It's your THIRD Rival Battle in the game! (For EXP, not counting the mandatory World Tournament Battle)

The Three Musketeers no longer have homes, so they'll quite randomly encounter you as you walk through Unova. Completely optional. Virizion Wireless is stationed East of Opelucid, Cobalion is Southeast of Lacunosa, can't miss it, and Terrakion is on Route 22.

Route 10 seems to be blocked off by construction work or something. Other than that, no serious map changes.

When you beat Drayden, New Team Plasma uses their FLYING WARSHIP to freeze over Opelucid City. They're serious. To advance, you have to beat the Team Plasma members there AND a Shadow Triad guy.

Route 21 brings back the WONDERFUL water Route of death. Thankfully it's small.

Your Rival will be in Seigaiha and tell you to fight Shizui or something. His gym is a serious relaxing vacation with some sweet elevator music.

Go to Route 22 and find Terrakion. You don't have to battle it, but Achroma will encounter you give you his Achroma Machine. It moves Crustle, which you need to get to the Plasma Warship again. They just walk away for him, but you're not cool enough, so it fights you.

You have to go to the back of the ship and do a warp panel "puzzle" (It's a puzzle if you want it to be) so you can get a glimpse at how they're freezing Unova. They've imprisoned Kyruem and are abusing his ice powers. After you fight more goons and some important guy in a double battle with the Rival, they fly to Giant Chasm and kick you off.

Giant Chasm is accessible, for the first time,through Route 22. The ease of access Strength Boulder is still near Lacunosa, though.

You, once again, go to the Plasma Warship, and go to the front, where an ACTUAL puzzle awaits. After you clear that, you get to fight ACHROMA~! (Sexy battle music) He likes Steel types. When that's done, you go to a room where you find Ghetsis, but he leaves you to fight the Shadow Triad. Your Rival's there, but he's dumbstruck that the Purrloin that was a gift to his sister was used and evolved by Team Plasma.

From there...you go in to the cave where Kyurem is... and Ghetsis has gone completely insane. He orders Kyurem to impale you with Ice Spears. You're about to die, too, when N swoops in with his dragon and destroys the ice spears. But that's short lived, because Ghetsis makes Kyurem turn N's dragon back into a stone and then he absorbs it, becoming Black Kyurem or White Kyurem. Then you have to fight it, but Ghetsis uses a machine or something that stops all your balls from working. KILL IT and separate the 2 dragons. After that, Ghetsis himself challenges you, and his music and new clothing show just how insane he's gotten. He uses some type of cane now.

When that's done, your friends, the old Team Plasma people, thank you, and you can go on to Route 23, which leads in to Victory Road.

Victory Road. Is completely different. And very, very large. Badge gates are just on 1 bridge, there's a PC before you enter, as usual, and it starts out with what looks like a destroyed castle.  It also involves an outdoor area and, huge surprise, a cave. It ends in one of the rooms of the old Victory Road, and you fight your Rival for TM24 Thunderbolt. The old Victory Road seems to have destructified, along with Route 10.

The Elite Four members haven't changed at all, but their rooms and teams have.

The champion, as stated in the first post of this thread, is the girl who knows the hearts of dragons, Iris. She means business.