Database: video_games
Question: What is the name of the publisher that released the most video games in 2007?
SQL: SELECT T3.publisher_name FROM game_platform AS T1 INNER JOIN game_publisher AS T2 ON T1.game_publisher_id = T2.id INNER JOIN publisher AS T3 ON T2.publisher_id = T3.id WHERE T1.release_year = 2007 GROUP BY T3.publisher_name ORDER BY COUNT(DISTINCT T2.game_id) DESC LIMIT 1