I have to admit, I do admire Nintendo’s way of approaching DLC. They tend to F most other things up, but they know how to keep their audience happy with the constant influx of free content in their games.
Monster Hunter 4 for the Nintendo 3DS isn’t any different. May will see the release of even more free content to keep you motivated to get out there and hunt those monsters. The DLC is Street Fighter, Metroid and Mega Man themed.
I believe the trailer below can explain it all for you.