I'm no expert in kanji... but I'd say that the characters on the second look a lot more Chinese than Japanese (complete lack of any hiragana/katakana, for example). I'd say the same for the first picture, too, especially based on the logo not looking anything like the JP ARR/HW logo. That logo is entirely with kanji (or whatever they're called in Chinese ^^; ), whereas the Japanese logo uses katakana to spell "Final Fantasy" (and also uses the English text, afaik).
Link to JP logo example.
I haven't seen any of these previews in any live letter. They were brought up on these forums, however, after they had been shown to the
Chinese audience and were linked from some Chinese website/blog, IIRC.