According to Dengeki Online, the second season of Toaru Kagaku no Railgun
was announced at the Dengeki 20th anniversary festival. Details of the new season will be revealed in the Monthly Comic Daioh December issue, to be released on October 27th.
A new trailer of Toaru Majutsu no Index: Endymion no Kiseki
was shown at the festival. The movie will be premiered on February 23rd 2013.
New trailer of Index movie
Toaru Kagaku no Railgun 2nd Season