I have come across information for both dwemer ruins and nordic ruins. What I am wondering is if there will be elven ruins?
If so from what type of elves?
Aylieds? Snow elves? Other?

Aylieds
Well maybe at some Cyrodiilic borders regions
Falmers
http://www.uesp.net/wiki/Shadowkey:Glacier_Crawl
They are very rare I believe small settlements can be found in glacier areas
Other can be dwemers and dunmers their fort ruins I believe can be found at Hammerfell and Morrowind borders

Dwemer are elves.

fix'd.

That ruin in the trailer was most likely dwemer.
I wish there would be other elven ruins as well.