Yes, FFXIII sold pretty well on 360, so a FFXV port to XB1 just makes sense. Also, PS4 and XB1 are very similar, so I'm sure it's relatively simple and inexpensive to port over. That, and it has the muscle to run them without much issue, which is more than we can say for the Wii U.

TBH third party games dont sell much in nintendo home console. And compared to playstation and xbox third pary games make no sense. And this might be repetitive but the term "You cant sell a game in nintendo system if it doesnt have mario name" is kinda true.

FF XV and kingdom hearts 3 might seem a better fit on Wii U. But in reality Xbox One is perfect. And developers will not take any unnecessary risk at this situation of industry.

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Porting from x86 to x86 is easy.

Porting from x86 to PPC is hard and requires good devs that know how to use the superior architecture and RISC.

Yes... for the same reason games like FFXIII made sense on 360 rather than Wii.

KH3 Fused and FF15Quadro Edition will be out 2018 on Nintendo Fusion. Half a year after KH3 release on PS4 and FFXV-2-3-4 out for PS4/X1/PC.

Last generation until towards the end the Xbox 360 had a much better JRPG library than the PS3, which eventually overtook it. Sales were not astounding, but far from dead.

Last generation I think SE developed in a PC dev environment and ported to relevant consoles. I reckon they'll continue doing that, given its even easier on the PS4 and X1's architectures.

Well, the XBO is a pretty capable system so of course they are going to port those games over to that system instead of the Wiiu.. I'm sure that a WiiU version of KH3 could do better than a X1 version, not sure about FFXV though!

The portable audience does matter, at least with Nintendo fans. That's because the install base for portables is much, much higher than home consoles... currently. The DS had 155 million units sold, and most of those people at least know about the KH games out for the platform, and the games sold very well. Same thing with 3DS, KH 3D did very good business; who's to say that there aren't people who own both Wii U and 3DS? Considering how the hardcore Ninty fans have gotten the Wii U and only recently are the casuals getting into it, the audience is definitely there. You have to remember that fans like me were 10 years old and playing the original game on PS2; we took different journeys, but that doesn't mean it doesn't make sense to put it on the Nintendo home console.

That said, just because the audience is there doesn't mean they are necessarily smart. Going for the long-term investment is always worth it, because short-term wins don't last. Putting in that extra effort and extra money to develop for PPC architecture would be an excellent long-term investment, because it continues to establish the Sony/Nintendo exclusivity on the franchise. From a KH fan's point of view, MS doesn't deserve KH. From a business standpoint, I'm closing off a channel of productivity by doing this. It doesn't make sense to me.