Blood Bowl 2, in the most basic sense, is an insane combination of American football and Warhammer brutality. While you're still technically playing football, the matches feature about as many murders and dismemberments as they do touchdowns, though with half the 'athletes' being bloodthirsty Orks and similar monstrosities this really shouldn't come as much of a surprise.
After already releasing a whole bunch of DLC factions, Blood Bowl 2 developers have just recently added a brand new expansion, as well as a Legendary Edition that bundles all of that together into one neat package. If you need a quick overview of what exactly the Legendary Edition brings to the table, you'll find the recently posted trailer showcasing just that right below. Have a look:
In other words, Blood Bowl 2: Legendary Edition brings with it all of the current Blood Bowl 2 races, as well as all of the features from the official expansion: 8 new races including the Kislev Circus and their cuddly bears, a new Khemri stadium located at the base of a rather large pyramid, a couple of new game modes, and perhaps most interestingly of all, the ability to create teams from multiple races.
If you would like to learn more about Blood Bowl 2 and its expansion, or just grab yourself a copy, you should head over to either the official website or Steam. Just keep in mind that you don't need to purchase the Legendary Edition if you already own the DLC, its mostly a way for new players to get all of the races in one neat (and greatly discounted) package. Have fun!