BATTLE FRONTIER CONFIRMED: http://imgur.com/a/oLueh#lKVrM0m

NPCs: "Battle Frontier Facility No. 1: Battle Tower construction model."
"It's planning to be upgraded into a special facility called Battle Frontier!"

BATTLE MAISON CONFIRMED: http://i.4cdn.org/vp/1416433049600.jpg
Same interior as Kalos Maison.

Second day care in Battle Resort, close to IV checker.

Move tutors in the Battle Resort:
https://i.4cdn.org/vp/1416437384035.jpg

Uproar - 8BP
Iron Tail - 8BP
Bounce - 8BP
Drill Run - 8BP
Iron Head - 8BP
Zen Headbutt - 8BP
Aqua Tail - 12BP
Dragon Pulse - 12BP

>Mega Stones found:

Alakazite
Mawilite
Aggronite
Manectite
Medichamite
Mewtwonite Y
Heracronite
Pinsirite
Banettite
Absolite
Aerodactylite
Kangaskhanite
Gengarite
Cameruptite
Sharpedonite
Steelixite
Scizorite

*Your starter's Mega Stone is given to you after defeating Kecleon on the bridge*

Some more miscellaneous screenshots: http://tieba.baidu.com/p/3420062800

>Other info

Draco Meteor tutor in Sootopolis City.
Hoopa no longer tradeable (X/Y).
SHINY Reshiram and Zekrom now tradeable (X/Y too). Shiny lock possibly removed.
Mauville City is a 3 story shopping mall.
Scott has not been seen anywhere yet.
The Pledge Move Tutor is in Mauville City.
Moss Rock is in Petalburg Woods, Ice Rock in Shoal Cave(?).
You can rebattle NPCs and E4.
Lati@s Mega Stones and Soul Dew are now tradeable online.
You get Latios/Latias after the 5th Gym when Steven Stone takes you to it.
Latios/Latias can be called upon at anytime to "Soar." You don't need them in your party to do so. You need the Eon Flute for this.
Game Corner closed.
All X/Y bottom screen functions return.
Safari Zone confirmed.
Nothing about Gym Leader rematches yet.