By necessity, Super Smash Bros. on the 3DS is a very different game from its predecessors. It's built for a smaller and differently structured system and doesn't have some of the stuff that previous Smash games had, like a tournament mode. But, what one person claims are newly discovered audio files hidden inside the game seem to indicate that those features might have been in the works.
A user on Sounds Resource—a website where users can share sound effects pulled from video games—has apparently managed to access files where the Smash announcer's familiar voice calls out elements that aren't in the final 3DS version of the game. Now, the voicework in these files could be elaborate fakes. But it definitely sounds like the booming intonation of the guy doing intros for Smash 3DS. The terms "Boss Battle," "Tourney," and "Event Match" all reference modes that have been in past games such as Super Smash Bros. Melee and Super Smash Bros. Brawl. The "8 Player Smash" announcement is the one that's most intriguing as it teases a beefed-up multiplayer option that the current game doesn't have.
There's a chance that these sound files are for the Wii U version and exist as either a remnant of shared code. Or they might be a harbinger of how the portable and home console versions of Smash Bros. might work together. We've reached out to Nintendo for comment and will update this story if they respond.