With the surprise reveal of one new character for Super Smash Bros., Cloud from Final Fantasy, Nintendo has teased a special presentation focused exclusively on Smash Bros. It's scheduled for next month. I expect we'll hear more about changes and DLC stuff (and probably even more stuff we aren't expecting) there. I'm excited.
Cloud is an interesting choice for sure. Definitely a popular and iconic character. I'm interested to see how he plays. He also represents new ground being the first Smash Bros. character never to previously grace a Nintendo platform.
Fan Speculation: START! Please try not to kill each other. :)