What would have happened if Ivan the terrible had married Elizabeth would their son if they had one unite the two kingdoms and create a juggernaut or would the kingdoms remain sepreate similar to when the Hanavor family ruled England
So Ivan was on good terms with the bowyers until 1560 when the the relationship began to sour he accused them of killing his first wife then in 1565 he created the Oprichnina which was the final straw for the bowyers
Elizabeth became queen in 1558 so she would have been ruling for 2 years when Ivan needed a new wife
Also the patriarch of moscow at this time was Macarius a close advisor of Ivan's who was responible for the coronation of Ivan and was made temporary head of state when Ivan attacked the Kazan