Future Primal fight idea: Primal Barrage! ( Main story spoiler)

When I got to POST story mode Garuda, When I saw the CS with the three primals at once, I was thinking to myself, Will I have to face these three primals at once? Sadly I that didn't happen and some machine ate the primals XD!
So what I propose at some point in the future, is to be able to fight all three ( more in the future) either in succession or in one HUGE battlefieldwith all the primals ( 8-24 man content).
A Special ability they can do when they are near each other is "Tri-attack".
I really do like the concept they did with the CS, which brought about my little idea :P.

I didn't find the right solution from the Internet.

References:
http://forum.square-enix.com/ffxiv/threa...tory-spoiler%29

Digital Security Video Example