I posted this in the EVO announcement thread, but I'll post it again.
Even if you're a Nintendo fan and care nothing about eSports/competitive gaming, you really should watch "The Smash Brothers" documentary.  If you're a fan of documentaries in general, you should also watch it.
It's broken up into multiple parts.  Here's a link (just start on part 1): 
https://www.youtube.com/watch?v=6tgWH-qXpv8&list=PLoUHkRwnRH-KTCH3tJ9WvsWWPEgUu-y6dIt's broken into 9 parts and each part is 20-35 minutes long.  So the entire thing is 4+ hours.
I've watched a ton of Starcraft 2, but I never followed SSBM.  After watching this documentary, I feel like I have a pretty good grasp of the scene (in general) and can appreciate EVO and MLG a lot more when SSBM comes back.  (Starcraft 2 is also coming back to the next MLG, btw.)
Anyway, I highly recommend watching it.  I know it's a lot, so just watch it one part at a time.  You won't regret it.