Hmmmm what could the new Jedi be? We have Luke ROTJ, Kit Fisto ROTS, Mace, Kenobi ROTS, and Anakin ROTS so far. I am guessing it will be one of the "background" Jedi Knights from the council or even an EU Jedi like Quinlan Vos. I would be happy with any of the following Aayla Secura, Ki-Adi-Mundi, Plo Koon, Saese Tiin, or Eeth Koth.
If it's a main Jedi I hope it's Yoda or ANH Kenobi.