Very likely, are you joking they are very unlikely to announce this so soon after releasing a fallout they are most likely going to announce it next year or the year after that so I wouldn't get your hopes up.
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If they announce it will still may not see a release for another few years.
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Skyrim was announced a year after New Vegas.
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NV wasn't made by Bethesda
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Your right, but what about Fallout 3 and Oblivion?