Windu´s Death
i believe he will die heroicly.
mace windu is supposed to be a legend, although they never talk about him on the original trilogy. i can see by his lines and actions that on the prequel trilogy Lucas wants to make him the secon man-to-yoda ...another jedi legend.
we saw how in one scene when anakin compares obiwan to great jedis he compares him to windu and yoda. as if they were almost equally important.
on the jedi council they are the heads. some say yoda and some windu.
windu´s been described as a warrior, a powerfull one, but his lines demostrate he is very wise also. so i think lucas is preparing a very good death to this character. will be a turning point on episode III.
he will die as a hero, either protecting or saving someone(s).
...and samuel l jackson has said he WANTS a very good death.