
Even with great voicing actors such as Nicholas Cage and Bill Nighy, the movie is just fun enough for some 4 year old stupid children who would not give a shit about what one of the most important mangaka did create.
Tezuka's manga influenced the entire production of comic books in his time, and since this very formatted media has not seen many changes, one may say Tezuka is still influencing the biggest part of the current comic books production, 20 years after his death.
The most horrifying fact, according to me, might be that such a bad movie is hiding Osamu Tezuka's own production as an animated-movie director ; he was one of the best directors ever in this field, even if his best works were not the old series adaptations of "Testsu-wan Atom" ("Astro Boy"), but short films he made at the end of his life, such as "Jumping".