A television advertisement for the March issue of Kadokawa Shoten's Newtype magazine has reportedly revealed that the "true" relaunch of the Haruhi Suzumiya anime series will premiere on television in April. The March issue will ship on February 10, and the television advertisement can been viewed for now on Nico Nico Douga website. (Nico Nico requires viewers to register in Japanese.)

According to the cover, the magazine will detail the staff and story of the new anime project based on Nagaru Tanigawa and Noizi Ito's Haruhi Suzumiya light novels. The issue will also have an interview with "Brigade Leader's Assistant" Yasuhiro Takemoto. Takemoto was an episode director on the first television series, while the Haruhi Suzumiya character is the fictional "brigade leader" of the franchise.

Tanigawa wrote the original light novels about an eccentric, assertive girl who creates her own school club ("S.O.S. Brigade") to plan and execute her strange antics. America's Little, Brown Books for Young Readers will publish the light novels in English starting this April, while Yen Press is publishing Gaku Tsugano's manga version. The first television anime series aired in Japan in 2006, and Bandai Entertainment released it in North America in 2007.

Since the first series, the creators have been dropping hints about more anime projects. One of the first indications came in a cryptic December 2007 website update that listed Takemoto as the director of a new project and hinted at a story based on the fourth light novel, The Disappearance of Haruhi Suzumiya . Another web update last May relisted Takemoto as the "brigade leader's assistant."

Two spinoff manga, Puyo's Suzumiya Haruhi-chan no Yūutsu four-panel gag manga and Eretto's Nyorōn Churuya-san parody manga, are being adapted into web anime that will premiere on February 13.

Source: 2ch

Update: More background information added.

Update 2: The J-Cast News website reports that it contacted a public relations representative from the Kadokawa Shoten Animation Group, and the representative said the group is absolutely not making an announcement now. On the topic of the April television debut, the representative reportedly said, "It is a rebroadcast. It is broadcasting mainly on Teletama and other UHF stations." Thanks, Tofusensei.