No no no. You got Alduin's Wall confused with these other Walls.
I'm going to post some clippings from my http://www.gamesas.com/index.php?/topic/1171209-dragons-discussion-thread/ which is for any discussion on Dragons, Dragonshouts, or the story including Dragons / Alduin. So if you want to reply just go there...
Here's the clipping.
Dragon Shouts
Dragon Shouts are one of the new gameplay mechanics in Skyrim. A new set of powers, that stand apart from the existing magic system, based around these words of power and when learned how to say them right can unleash a broad range of powerful effects. In the game, players will guide their hero to learn ever more powerful dragon shouts, and then use these arcane powers to supplement other combat and magic skills.
There are over 20 unique shouts and over time, players will collect their own arsenal of shouts. Each shout is formed from three words of power. “There are three words for each shout, and there are three levels to them. The amount of time you hold down the shout button is how many words come out,” Howard continues. “It becomes a bit of a collection mechanic – to collect all the words.”
How are Dragon Shouts acquired?
The ability to attain these powerful dragon shouts is unique to your hero and the path to attaining them is a quest in itself.
Upon defeating a dragon, Skyrim’s hero absorbs the soul of the fallen creature, which "fuels" his ability to learn a new shout. http://media.pcgamer.com/files/2011/02/Skryim-Trailer-anolysis-27-Dragon-Soul-590x425.jpg.
Later, the player must search out these http://download2.zenimax.com/akqacms/files/tes/concept_art/WordWall.jpg. Upon these walls, individual runes stand out to the hero because he or she is dragonborn. As you approach the carvings, one word in particular will begin to glow. The words are how you increase the power and intensity of each dragon shout. They are written in this ancient language, dragon language and every ancient wall you encounter carries an ancient legend.
Also new info from the Italian magazine article on Skyrim indicates there are special enemies who guard these Walls. Undead Dragon Priest are a sort of guardian of the "dragon shouts walls" That pop up, sometimes when the player approaches a wall. "a 'ghostly dragon priest' who bursts out of a sarcophagus to attack and startle the player" - Official Playstation Magazine They put up an hell of a fight apparently too.
It is also mentioned in the various magazine articles that "Some Dragon Shouts can be found inscribed on the walls of ancient Nord dungeons"
Now that's only a snipit of what the full thread has so if you haven't read it already go ahead.
As for Alduin's Wall... It's just a ancient structure that sits in Sky Haven Temple that tells the story of Alduin. Basically from what I understand about the lore, Alduin's Wall is likely from the Greybeards.
The ancient Greybeards still sit atop the many steps leading to the peak of High Hrothgar. An ancient and honored people, who dwell primarily in High Hrothgar, they live in absolute silence in order to better attune themselves to the voice of the sky. They are some of the last mortal Voice users.
Master Voices (known simply as Tongues) have legendary, and often unbelievable powers. The most powerful masters must even be careful whenever they speak, as their voice can cause great destruction. They must go gagged, and communicate through a sign language and through scribing runes.
They basically are the people who would be predicting this or warning of these events through runes etched into rock because they cannot speak without causing massive destruction.
Dragon's Past History | Connection to Main Storyline PlotAs decoded from http://elderscrolls.com/assets/swf/Wall.swf. Alduin's Wall is a ancient structure that sits in the Sky Haven Temple, a last refuge for the dwindling forces of the Blades.(More on this below). The wall is named after the devastating dragon depicted upon it's carved surface. Across the wall is inscribed a history and a prophecy that speaks to one of the greatest legends of Tamriel - The story of Alduin.More on Alduin in spoiler below
Spoiler
Alduin's sobriquet, 'The World Eater', comes from myths that depict him as the horrible, rauaging firestorm that destroyed the last world to begin this one. Akatosh was the first of the et'Ada to form an identity, bringing with him the concept of Time.
The Nord's know Alduin as a terrible, ravenous dragon who presides over the cycle of existence and devours the universe at intervals. Alduin's coming is feared by all pious Nords, and he is the object of (through Nordic eyes) perverse worship by the Altmer, who venerated Auri-El. Auri-El is just the Elven name for Akatosh like Alduin is the Nordic name for Akatosh.
Nords therefore see the god of time as both creator and harbinger of the apocalypse.
The prophecy depicted on Alduin’s Wall is dire, but it is not without hope. A single individual, gifted with the same incredible powers held by the dragons themselves, may rise to fight against Alduin and assure the world’s survival. The Blades shown http://dl.dropbox.com/u/3593710/Skyrim-Wallpaper2.png bow before the Dragonborn. They’ve protected the line of the Dragonborn for generations in anticipation of this moment, when a Dragonborn would rise to face Alduin upon his return. [/color]
http://www.youtube.com/watch_popup?v=qeS_lbTd4Ws&vq=medium