Although listed as a DLC, Mario+Rabbids Kingdom Battle Donkey Kong DLC can be an entire game by itself.

Speaking to Eurogamer, Mario+Rabbids Kingdom Battle Head Honcho Davide Soliani said that the DLC contains about 10 hours of gameplay with 20 minutes of new cinematics and 45 minutes of new musical composition.

It was going to be a small experience, two to three hours, one world. But in the end, it is almost half of the main game. In the main game you have 27 minutes of cinematics. DK has 20. In the main game you have four worlds, this is one but it is as big as two. It’s 10 hours of gameplay. We’ve put everything in – all our passion.

Grant has added 45 minutes of new music. It was a nightmare to make him work for 45 minutes – he’s not used to work. He’s a little bit of a diva, a little bit of a slacker.

We wanted to change the feeling of the game as well. No battle is equal to another. Our programmers, when I told them, started to panic because it meant we’d have to rework from scratch the combat system. But it was worth it. People who’ve tried it say it feels different. Now I’m anxious about the player reaction. I always am.

The DLC will arrive on 26 June 2018 but gamers who have purchased the season pass can start their Donkey Kong adventure earlier.