ANSWER:

This is in Allah’s hands! 

If such an individual didn’t pray a single prayer, he is not Muslim.

If he committed one of the things that nullify Islam, he will abide in hell for eternity. 

Sheikh is this correct that if one believes in Allah(SWT) and not commit shirk and belives that prophet Muhammad(peace and blessings of Allah be upon him) is His final messenger then no matter what one does he will ultimately enter paradise?