Not going to happen after Hitler's betrayal of the Munich agreement. It was such a severe blow to his credibility that after that event no Western power would deal with him anymore.
Maybe if he only used the turmoil in Czech to get a more German-aligned elite in power there but not occupying it, maybe then the West would have remained open for negotiations but i think even then only if the demands for Danzig happened many years later, not in the next year. Hitler was very greedy, Sudetenland half a year after Austria, and Danzig a year later. It can't work this fast. Slow reconquista is a real option, rushing everyone and betraying agreements in the process is not. The Spanish reconquista laster more than 700 years