No need to petition for something that is already happening.
It's not happening. In an interview with him at TGS 2012 (September 2012) he basically confirmed he no longer works on FF games. However, he said that if people wanted him to return to the series, they should as Yoichi Wada. That's one of the reasons I've made this petition.
I would like to see that interview.
No problem. Here's the quote and source:
1UP: Do you anticipate working with the Final Fantasy series again? Is that something you'd like to do or something you think you'll do?
HI: I'm a working stiff, so if the president tells me to do it, I'll do it. [laughs] Talk to Mr. Wada.