[zaeraal]

Originally Posted by MrTerrorist

Season 2 has been confirmed to be airing this April 2013!

Another confirmation http://kodoku21.blog83.fc2.com/blog-entry-2727.html of the news.

It's quite surprising that they went for Spring, but that leaves possibility of Index 3 for Fall.
If everything goes well, we can have Movie (and Game) in about a month, later in Spring (+Summer for 26 episodes) Railgun 2 and right after that, Fall (+Winter) possible Index 3.
A completly awesome year (ofc. depending on the adaptation).