I am going to guess that their may be some truth to the story but then Hogan goes and starts expanding on it till it becomes complete BS. In this case My guess is Hogan did meet a make a wish kid who died like weeks or months later but all of a sudden he works it into his Wembley Story
On a sidenote, my favorite part of his story was when he talks about the make a wish kid's parents and he just has to point out how they are huge hulkamaniacs.
I’ve posted this video before, Hulk’s the biggest egomaniac to ever live lol