No you can't say that...
Unlike in One Piece, Luffy's mother, who we may gonna get to know later....
think about PG manga/anime Pokémon, where they talk about Ash's dad, never ever show us a single hair of him...if now now then when ?!

It's really a GodDamn bad ending(?), like Kaze No Stigma...
It really disappointed me, as well as made me sad...! ��

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Tv Tokyo - Anime & Manga ~ [color=red]MinatoAce[/color]

After reading Bakuman till the end, I know the reason why some manga got axed/rushed ending.
Its because of the reader.
The reader of the manga magazine who has vote power to end it. (actually more to keep it on going).
So dont blame the manga, dont blame the mangaka,
blame the system they create/use by making it like that.
Why? Because I think if they make the system like movie production, they could get box office or bomb office. But this system they use, to ensure their business to keep on selling. (explanation of some of the system are in the Bakuman).