We can only speculate if such coup would happen or not, but as Carl stated, there was quite a lot of evidence that it was not fake. Hitler replaced Bloomberg and Fritsch as the result of the Hossbach Memorandum conference - the of (lack of) support of war in 1937-8 is evident, and Hitler's position was quite weak, it all changed after the Munich in September 1938, his success of getting Czechoslovakia without a shot was highly regarded (plus Hitler replaced Bloomberg and Fritsch). What was Hitler's first failure in Austria?
The situation in 1938 and 1939 was quite different, for multiple reasons:
- German army was much weaker in 1938 : they lacked training (extra year was huge, both for experience and strength of units) - They had more than 2 mil. soldiers in Polish campaign, but this could be 50-75% in 1938. The Czechoslovak army mobilized into 1.2 mil. strength, which was more than what Polish army had (<1 mil.) The same goes for equipment, few examples: in 1938, Luftwaffe had around 500 Bf-109 of B,C,D variants (weak engines and armament) as well as Ar-68 and He-51 in frontline service against 370 B-534, in 1939 Luftwaffe had Bf-109E, which was much stronger. There were about 2000 tanks in Wehrmacht in 1938, but less than 100 were modern Pzkw-3 and Pzkw-4 types, Czechoslovakia had 350 more modern. tanks. In 1939 Poland had almost 500 tanks but Wehrmacht had 2500 tanks, including Lt-35 and Lt-38 from Czechoslovakia.
- The border terrain was much more favorable for defense in Czechoslovakia, compared to most of the terrain in Poland. Czechoslovakia had a system of fortifications (not complete, but functional and valuable), which Poland lacked.
- there was a strategic depth. Czechoslovak military planned to shorten the front and withdraw eastwards. Loss of capital was expected and would not constitute an end to the war. Germans would see huge casualties when overcoming the border (fortifications), their logistic stretched and have to fight against army of similar size on relatively short front, once again in a favorable terrain (Moravian Highlands, Slovak border mountains)
- It was unlikely Czechoslovakia would see second front (like Poland did being attacked by the USSR), Romania and Yugoslavia would keep Hungary in check, and USSR could possibly deliver some help, such as airplanes.
- German economic situation was much worse in 1938, the gained a lot by seizing Czechoslovakia in March 1939.