This is how i saw kalpas :
An Et'Ada, for example Lorkhan , decide (perhaps pushed by Sithis, in order to escape the Godhead's dream) to create the mortal world. Some Et'Ada refuse (daedra for this time), the other accept. "Lorkhan" is sundered by the "Time god" and his allies. There's the convention, and other distinction are done. End of Dawn Era.
Later, Alduin eat the world, and a new kalpa begin ;this time, according tohttp://www.gamesas.com/topic/1249697-on-boethiahs-summoning-day/, all is reseted : some mortals can ascends to an Et'Ada like rank and Divines, Daedra, and the others can change roles, ; thus, http://www.gamesas.com/topic/1361719-xarxes-ohgma-and-hermaeus/page__p__20541924#entry20541924, http://imperial-library.info/content/imperial-census-daedra-lords:
Nocturnal is accorded the title Ur-dra by nearly all the Royalty of Oblivion. As the mother of night, she claims to be an aspect of the original Void itself, and it is generally deemed best to fortify this declaration in one’s evening prayers.
The different aspect of the "Time-God" can be explained by different ways; in fact, before they were only one time-god (Aka ?), who divided (but when and how ? because of Maruhkatis, with a retroactive effext for Aurie-El/Akatosh ?) into Akatosh, Auri-El, Alduin (Alduin can be regarded as a "son" of Akatosh if he separated from im). Another idea can be that each time, a new Dragon Time-God mantle the former, or at least oppose to the actual Space-God, and stay in the other kalpas ; that explain how http://www.gamesas.com/topic/1352265-akas-relation-to-kalpas/. Arkay may be only a kalpa old (http://imperial-library.info/content/nine-divines-arkayand http://www.imperial-library.info/content/forum-archives-michael-kirkbride)
Arkay: "Lies from a previous age."
The fact that the Space-God ma have different aspect (Shor is in the Dreamsleeve, or Sovngarde, but at least isn't the moons, contrary to Lorkhan). they may be http://www.gamesas.com/topic/1363364-a-nord-named-shor-mantled-lorkhan-in-the-previous-kalpa/page__p__20569922#entry20569922. The same could be said for others, like Auri-El.
OK, but lady_freyja reminded me of this :
http://www.imperial-library.info/content/world-eating-101
And all is ruined : how could there be a change in the Et'Adas roles when the kapa resets AFTER the convention ?
(http://imperial-library.info/content/dawn-eraandhttp://imperial-library.info/content/merethic-era on TIL)
These histories could be explained thus ; At the begining, we have the space and time gods, and some aedras and daedras. And Alduin doesn't eat the world ; he only eat all the people and the constructs, reseting to the begining of Merethic, with a return to Ehlnofeys. The ascended mortals, powerful enough to escape to Alduin, can take a place in the pantheons. And maybe even the "Aka" could split into different Time-Gods
Moreover, the history of the previous kalpa may have echoes in the actuel, and as each times there's a Shezzarine and an Akaic fight these fight may be confused with the original Aka/Lorkhan one.
An interessant point is that in my first theory, the Thalmor endeavour (destoying all and returning to The Anu/Padhome, or at least to he Et'Ada) wouldn't been permanent, as there would be another Et'Ada/ Space-God who would create a new world ; in the second, the Mundus wouldn't be ceated another time.)
In this second theory why is Alduin known as World-Eater ?
All is another times crushed, because of "Aka" (Ok, one of his aspects but I needed it for the title)
Have you better explainations ? What do you think ? React!