You never know. The actual Brawl developers are probably looking at these hacks and playing them for themselves. Your Peach's Castle could be featured in Super Smash Bros. 4, seeing how you basically made an entire accurate model for them to use and download for free. Makes ya guys wonder if they're using our stuff for SSB4.
No way, the pros always like to make their own stuff. But the idea of Mewtwo's creations being in the next smash bros. sounds really exciting, doesn't it Mewtwo2000?