Will we be able to explore Alduin's Wall 1000 years before the dragon crisis in Skyrim? Will there be anything that tells the story of the three ancient Nords that defeated Alduin? Will there be dragon walls in Skyrim?

I guess there will be Draugr in alot of dungeons in Skyrim.

I guess the legends will be there

I doubt there'll be word walls considering not every player can be Dragonborn, but i'm sure they'll have Alduin's Wall and Dragur.

Already confirmed there will be Dragon Shrines in ESO. Not too sure if we'll actually be able to see inscriptions on the Dragon Walls however. I'll leave that one to the Lore Experts to answer.

http://elderscrollsonline.com/en/news/post/2012/11/13/ask-us-anything-ebonheart-pact-part-1

Dragon shrines yes - that's practically a dungeo!. Not useable world walls.

They'd be there but they'd just be writings to you as you aren't Dragonborn.