Oh boy where do I begin first let get the current ones we know will arrive later being...

Crystal Tower theme
http://www.youtube.com/watch?v=2n_3fXN08no

Cloud of Darkness theme
http://www.youtube.com/watch?v=Gxn2W2qg1xU

Clash under the Big bridge
http://www.youtube.com/watch?v=l0JnXdfoYpY

What i would like to see is

Final fantasy 7 battle theme (Most likely will have remix version once we enter Garlean Empire due to Garlean Empire being the technology City-State. Most likely this will play during a Main Story quest when we are on a Train fighting Garleans trying to kill us.)
http://www.youtube.com/watch?v=JSUlWl27lDk

Final fantasy 8 battle theme (Most likely the same with FF7 battle theme. Got to wait for Garlean Empire to be accessed first but would love to have this theme play during the final quest for Gunblade class (lvl 30 quest) which the Gunblade class guild is currently located in the Garlean Empire)
http://www.youtube.com/watch?v=btHMMDz27hw