We already know that Arnold himself won’t be back for the “new trilogy” being planned for the Terminator series, but we may have another old face back.
Edward Furlong is now being rumored to return to his role as John Connor that he played in T2: Judgment Day. Take this with a grain of salt for now because nothing has been confirmed except for the fact that three more Terminator films will eventually get made.
The fourth film has already been written by the writers of Terminator 3 and is supposedly in the works right now. The rumor of Furlong states that his agent has confirmed it, but there is no solid evidence yet. Stay tuned for we’ll get you more as we do.