Hahhaha, no. To begin with, Shueisha its really advertising Hinomaru Zumou, all the posters on sumou matches, crossover with Kurobas, show that they want it to be big.(with the female audience at least).
And another thing, the sales before the anime doesn't matter, Kekkai Sensen only about 20-25k per volume before the volume, and now its selling about 150k-200k per volume, animes are meant to advertise and make the manga sell better, Jump aren't going to let it pass with a manga who is popular with the magazine audience, and who can be a anime really popular with the female audience like Kurobas, Yowapeda, Haikyuu, Daiya no Ace..