In June of the same year, John Asen II died, leaving the throne to his seven-year-old son Kaliman (). Coupled with the increasingly deteriorating situation of the Latin Empire, this development left John Vatatzes of Nicaea as the pre-eminent ruler of the region, and the obvious candidate for the capture of Constantinople.
The death of John Asen II in June of the same year, coupled with the decline of the Latin Empire, led to John Vatatzes of Nicaea becoming the dominant figure in the region and a potential candidate for the control of Constantinople.