According to the U.K’s Official Nintendo Magazine Website, The Legend of Zelda: Skyward Sword will be one of several Nintendo games to be featured at the Gamescom event taking place next week from the 18th to the 22nd. It is unknown, however, in what form it will appear, though it is fair to assume it will at least be the same demo introduced at E3. If you live in or near Cologne, Germany, you can purchase tickets to attend. Click "Read More" for the chart of ticket prices and their conditions.
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Probably just the same stuff from E3. I doubt they'd announce anything new at a random, little known gaming convention in Germany.