[UPDATE] The stream is now underway and you can watch it through Twitch right here in this post. Expect to see live gameplay for a host of upcoming Wii U and 3DS games. And don't forget, GameSpot is hosting its own live-streaming event today for Super Smash Bros. for 3DS starting at 2 PM PDT.

The original story is below.

Nintendo announced today that it will hold a special "Live @ the Treehouse" video presentation this Friday, September 12, where the company will show off the "final" version of Super Smash Bros. for 3DS. The game officially launches in under a month on October 3.

Also during the event, which will span eight hours, Nintendo will talk about and show off unspecified upcoming Wii U and 3DS games. Unfortunately, that's all Nintendo had to say about the event. Other major Wii U and 3DS games scheduled for release this year include Bayonetta 2, Hyrule Warriors, the Wii U version of Super Smash Bros., and Pokemon Ruby and Sapphire remakes, among others.

The presentation will be streamed live through Twitch, though a start time was not announced. Last week, Nintendo announced a special Super Smash Bros.-themed game sale, which is currently ongoing.

"Treehouse" is the name of Nintendo of America's development shop in Redmond, Washington. If this Friday's presentation follows the formula of similar events from E3, you can expect members of Nintendo's press team to talk about and play games with developer commentary.

Nintendo's Live @ the Treehouse video presentations are often more informal than the company's marquee Nintendo Direct briefings.

Eddie Makuch is a news editor at GameSpot, and you can follow him on Twitter @EddieMakuch

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