No, none of us know. We are end users just like you. If anyone of us is an Apple employe we would be allowed to divulge any information on coming products.
If you are talking about Ruby characters above the normal characters, I highly doubt Apple will provide these, however they are available in *iText Express* and *iText Pro.* Two excellent word processors.
In Japanese to help readers learning the complex Kanji (Chinese) characters, small ruby characters in the syllabic katakana or hiragana or latin romaji are written just above the character to show the pronunciation.