The Nougat beta builds for the Galaxy S7 already have a selector for Games and High-Performance modes, but Samsung looks like it's working on taking this to the next level. The Korean company has filed for protection of the brand "Beast Mode" in the European Union. The trademark will be used in relation to smartphone software, according to the filing, so it's pretty clear that we should expect Beast Mode to be in the Galaxy S8 when it becomes official in April. Unfortunately there's no exact way to tell what Beast Mode actually is, since there's no detailed description to go with the...
Source: http://www.gsmarena.com/beast_mode_could_be_a_feature_of_the_galaxy_s8_as_samsung_files_for_trademark-news-22300.php