Kevin De Bruyne had one time said he'd love to play with Cristiano Ronaldo before he retires so I do feel like his next destination would be Al Nassr definitely.
I think it's too soon to speculate about Kevin De Bruyne's future and his potential to play for one of the Saudi Pro League teams, he still on the golden age and want to spent his career with top European teams exactly under Pep Guardiola he still become regular players with Manchester City. Indeed he has decision one day later will play with Cristiano Ronaldo but its less possibilities during Ronaldo have been 38 years old and Kevin possibilities moving to Saudi Pro League clubs exactly three or four years later.
Not really small with payment salary receiving from Manchester City, although Saudi Pro League teams will give more bigger payment I don't sure make excited for De Bruyne will play there and he needs right time before leaving top European teams.