Watch this trailer first and then if u have the answers to my questions feel free to answer(questions will be posted below)

YouTube - Final Fantasy Versus 13 BRAND NEW Trailer !!

Now my questions( i might sound a lil eccentric but i was amazed to find out theres another Final Fantasy Versus game besides Dissidia):
.....

Whos the dude since the beggining and who is this chick?!

The dude looks like zack
and girl looks like aeris with blonde hair wtf??
and why do they look like there gonna throw down??
im confused is this like dissidia bringin old characters back??or is this all ff13 characters duking it out?? and in tht case wheres the black guy with a chocobo in his hair and lightning the free falling hottie!!!? answer me someone please
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Feel free to post any opinions on this trailer or on this game at all and please answer my questions lol