Each successive release in the Super Smash Bros. series has delivered a bigger cast than its predecessors, and that was no different in this generation's Wii U and 3DS entries. Masahiro Sakurai has often talked of the pressures this brings, along with the expectation of more general content from one release to the next.
Even on day one the current entries had the biggest roster yet, but it's easy to be blasé and underestimate how much DLC we had, too. The regular additions ultimately brought us seven new fighters, along with an extensive list of stages and Mii Fighter outfits. In fact, buying all of the extra content costs more than the core game itself, which is a topic we've debated in the past.
In any case, there's been a lot of DLC, and a trailer from Nintendo of Europe does a nice job of highlighting that. It focuses on the seven DLC characters and is mostly cuts from existing videos; check it out below.