Kai-Ulrich Deissner

Based on the provided news articles, there is no mention of an individual named Kai-Ulrich Deissner. The articles primarily focus on business news, including the potential acquisition of Media-Markt-Saturn by JD.com and the resistance from Austrian authorities, Lufthansa flight attendant strikes, and Eventim's disappointing forecast. Therefore, it's impossible to provide any information about Kai-Ulrich Deissner's background, newsworthiness, recent events, or current relevance based solely on the given content. The articles do not offer any context related to this individual.