It is official, Jor-el will appear in the upcoming episode titles "Kandor"
here is the official episode description.
Jor-El (Julian Sands) mysteriously arrives at the Kent farm searching for his son, Kal-El, but meets Chloe instead. Convinced the "Blur" is Jor-El, Zod enlists Tess’s help in finding him to force him to reveal the secret to his powers. Clark realizes Jor-El is alive and on Earth and races to find him before Zod does.