Except maybe Tidus is real - think about it.

All aeons are dreams of the fayth. But of what we have seen of them, they are practically the one and the same - therefore three Fayths for the Sisters, ek cetera ek cetera. So, each human-level complex creature (which neatly excludes that damn dog Yojimbo hangs out with), requires a base, a fayth, who is that creature. And isn't Jecht the Final Summoning? And those who are to be Final Summonings shall turn into fayths, as Yunalesca's hubby shows us... Which would mean that Tidus, together with every single soul in the Zanarkand Dreaming are fayths who are represented by a Dream, or Aeon version of themselves within the Zanarkand Dreaming. This would mean that the bubbles we see in the end may not be the Dreams - or then again, they may be - but the Fayth themselves, either reflected through the Fayths Released or forming some sort of cool jacuzzi thing, into the merciful Farplain's embrace, amen.

I wonder how many times the Zanarkand Fayths have relived and relived their lives, if this is true?