No. People, if you paid ANY attention to what Mickey says, Terra is a guardian of light. Mickey clearly says, "There's Sora, Riku, Me, My 3 friends(Aqua, Ventus and Terra), but who's the other one?" Lea cannot be a guardian of light because he is not trained with the Keyblade yet and it would take too long to train him.
KH3 will be about 1. Rescuing Terra and and finding Aqua and waking Ven(with Riku's new abilities) and the second half will be defeating the 13 of dark.
