Final Fantasy, its is a much bigger franchise by far.

I just see it as the bigger franchise, i never had the honor to play 13 but hopefully people understand 13=/=FF franchise (of course you have some that believe it :p )

KH3 is hard to tell cuz after KH2 all games that came out were on HH (not counting 1.5)

Probably, but because of that handheld games, kh maybe got some Nintendo fans too. I wouldn't be surprised if becomes the best-selling in the franchise.

It's not a competition, FF XV wins.

Final Fantasy XV

thats why i think WiiU is the better choice over X1 for KH3 but due to the obvious (wiiu=/=X1+PS4) it cant be done unless its a downgrade! I myself would of gotten it for wiiu but f***  the game now....... JK!!!! Im getting it for PS4, no f***ing way i'll miss out, also will get FF!

Seeing how the much maligned FFXIII sold more than KH2 on a much bigger install base I'd say FF. It just is a much bigger franchise with more mass market appeal than KH.

KH has a very vocal and loyal fanbase on the internet so it sometimes might seem bigger than it actually is.

Also gamers obviously prefer man on man action over man on duck action.

Hmmm... that is a good question.

I would say FFXV, but tbh i am unsure the series still carries the same "ooph" after the disaster that was the XIII series.
Kingdom hearts sells consistently well in the US.

So lets divide in markets:
Japan: FFXV is probably gonna sell more. The brand still carries some weight there.
US: I think Kingdom Hearts will sell more unless FFXV is exceptionally good.
Europe: Its a tie, but FF probably is more popular here.

Its a tough one, but i guess that depending on quality, FFXV might sell more. But KH3 beeing the final installment of the current series arc might be able to trump it.
Actually if RE5 is anything to go (end of a series story arc) by, KH3 has a pretty good chance of outselling XV in the long term.

Surprised that so many are confidently saying FFXV. Kingdom Hearts has a huge fanbase, far more than the fanbase for any individual Final Fantasy game.

The games have also all performed well while Final Fantasy games vary greatly in sales.

Not to mention that more and more people are going off Final Fantasy all the time.

Also the 2 trailers can out the same time but KH3 got far more views.

It's also got vastly more google interest.

FFXV, im saying 8m for FF and 5m for KH