It didn't, actually. If you beat the game, look at the credits - they go on for like 30 minutes. O_O
A ton of people were involved in this. Superbot had SSM helped them, which is a really high quality studio. Everything was just really inefficiently managed. In interviews, Superbot mentioned that they had to scrap the Prince from Katamari Damacy because they couldn't figure out a way to make him work, and decided to do Heihachi instead. There's also videos of old levels (like a train from Uncharted 2) that were just completely removed from the game, even though they looked nearly-completed.
This is what happens when you don't take game development seriously, and think you can just make/remove whatever you feel like.
If I haven't mentioned Trivio in my post, it's because she is so beautiful and precarious that I just wanted to show her how much she means to me.
Chrzym just because a lot of outside people were involved with this because of liscensing and what not, doesn't neccessarily mean the game had a huge budget.
With that being said I have seen indie developed games with more polish than this so they have no excuse either way.
And I do agree they horribly mismanaged the resources they did have. They could have never made mashups and no one would have missed them. Could have spent that time on more worthwhile features. And those lost levels/stages they scrapped should definitely have made it into the full game.