Even if this panel had some technical problems, and we couldn't see it right away we managed to grab most of the info out of it.

Do not miss the official preview. You'll find more pics (that includes some layouts too) in there and maybe some content that I missed.

Here is what we found out about the future raids and dungeons:

General
Basically all the raiding and dungeon content it will more open, no more dark places.
Every raid and dungeon will actually have a place in the world, not only a portal.

Dungeons

• 9 new dungeons right at the start in the new expansion.
• 6 of them are going to be on Pandaria
• All dungeons are going to be shorter and much more focused.
• Scholomance and Scarlet Monastery (Wings 1 and 2) will be back in Heroic Mode. They are gong to be more focused tho.
• Scholo
  
  • lvl 90 HC dungeon.
  • New layout. More focused and shorter and easier to navigate.
• Scarlet Monastery
  
  • Two wings,Library and Armory + Graveyard and Cathedral, remade for lvl 90 HC.
  • All nasty things removed - only cool stuff remained.
• Shado-pan Monastery
  
  • Located in Kun-Lai Summit
  • We will meet mysterious Shado-pan Clan.
  • Epic layout.
  • Outdoor dungeon.

Raids

• Expansion will come with 3 new raids. Epic ones!
• Raid Finder, Normal, and Heroic difficulties will be available for all raids from day 1, except old raiding content.
• World raid bosses will return!
• Raid Finder will have no lockup, but with some limitation...
• All the new raids will work in Raid Finder, Normal, and Heroic difficulties.
• Abyssal Maw will have no future. We wont see that.
• Mogu'Shan Palace
  
• Located atop Kun-Lai Summit at the center of Pandaria
• Six boss raid
• It will let you explore the hidden secrets of the ancien Mogu empire.
• Even the Pandarians pretty much never went to this place.