In general, as there are more than two years to go, these basic requirements have to be fulfilled:
a) a good / decent storyline
b) a better balance between Non-Jedi-Things / Jedi-Things (I preferred the original Han-Solo story to the Jedi story parts)
c) Jedis who actually use their brains (Hmm, who is behind all of this? Palpantine?!)
d) good / decent dialogues
e) a good casting including new faces
f) memorable moments
g) NO. FUCKING. EWOKS.
h) NO. MORE. SPECIAL EDITIONS BY GEORGE LUCAS.