KH games with Japanese Audio and English Text?

So basically, what is the status of Kingdom Hearts undubs, past, present and future?

I'm not well informed with which versions and releases of the myriad of KH games have in fact had Japanese audio, so I don't know where to go from here. I have a couple NTSC-J imports of KH games for PS2 but if the work has all been done officially and the PS3 or PS4 re-releases have the option for Japanese audio and English text, then undubbing at this stage would be futile I suppose, right?