As I don´t have enough information on the man I cannot make a what if but anyway : does anyone have more info on this man? "General Major Walther Wever, first Chief of the Luftwaffe General Staff, although he never held that official title, and was killed in a flying accident May 3, 1936. " "Long - range heavy bombers, capable of carrying massive bomb loads, were needed - and the Luftwaffe had neglected their development. The failure was in part due to the death of General Walther Wever, the Luftwaffe's first Chief of Staff. He had been an advocate of heavy bombers, and had launched a program calling for long - range, four - engine planes capable of "flying right around Britain under combat conditions." But Wever was killed in an air crash in 1936, and the program languished." http://motlc.wiesenthal.com/text/x19/xr1970.html
Try E R Hooton's Phoenix Triumphant Phoenix triumphant : the rise and rise of the Luftwaffe : Hooton, E. R : Free Download, Borrow, and Streaming : Internet Archive
While a strong advocate for strategic bombers, there were strong advocates for tactical/medium bombers. There was also practical limitations in number of air frames and engines producible and of course Goering and Hitler had the final say.