This was taken from an interview with Masahiro Sakurai, the creator of Super Smash Brothers Brawl:

IGN: Brawl seems like the perfect game to introduce a Wii headset for voice chat. Why have you avoided this?

Masahiro Sakurai: Well, when I first started making Smash Bros. Brawl, I thought it would be wonderful if online battles between friends had voice chat and potentially keyboard based chat as well. But there are all sorts of rules and regulations regarding communication on the Wii platform and so it was apparent to me that it just wouldn’t come together, we weren’t going to be able to do it, so we decided to cancel that feature. I’m very sorry about that. But if you’re really desperate for it, you could set up Skype by your game station and go at it with a friend if you like.

IGN: We have to ask because there are so many rumors about this. Are there any hidden characters to come? Can you unlock more hidden fighters by way of WiiConnect24 or will you offer new downloadable content — new fighters, for example. — using the service?

Masahiro Sakurai: No. There are no characters that can be unlocked via connecting to WiiConnect24 or interacting in that fashion. And I may be mistaken here, but the Wii doesn’t have a hard drive — it’s a disc-based system — so I don’t think we’ll be doing that, I don’t think it’s going to happen.

IGN: Have you done everything you can do with the Smash Bros. franchise now? In other words, can Wii owners look forward to a Brawl sequel in the future?

Masahiro Sakurai: Well, the series has already had three iterations so I cannot say with one-hundred percent confidence that there won’t be any additional Smash Bros. games ever. But, at the same time I’d really like to note that I feel like with Brawl there are already so many modes and so much to do that it’s really hard to exhaust what you can do with this game. I’m really against the idea of merely creating a sequel that would add modes or increase the number of characters in the roster — all the sort of things that just simply fatten up the game. I’d like to avoid just doing that if a sequel ever came out.

IGN: We think one of the obvious next steps for Smash Bros. is a Nintendo DS game. The fighter seems perfectly suited to the handheld. What’re your thoughts about such a project?

Masahiro Sakurai: Seeing the success that Brawl has had with the Wii remote being playing sideways, I don’t think that there are control limitations that keep it from being ported to the DS. But I personally have no plans to do this myself. If, in the future, such a thing was to be planned, it would be up to Nintendo to decide how and when and in what way they would like to create that sort of game.

This is just part of the interview. You can check more at the link.