Yay. Yuna is in Dissidia Duodecim!
And while it hasn't been officially mentioned, they gave it away quite cleverly in the Jump Festa 2011 trailer.
Why am I excited? Because Yuna is my favourite Final Fantasy character. I <3 her.
Anyway, this also means that the whole Jump Festa trailer has been released to the public. Check it out :)
Duodecim is looking better and better with each information release.