I wonder if the Belzer websites also show this picture?
The Rebbe's Brocho
I heard that the Belzer Rebbe didnt have kids in years, and by his visit to the Rebbe he asked for a Brocho, and shortly after he had his one and only son, Rabbi Aharon Mordechai.
He looks so young
How long is he Rebbe for?
I just did the calculations. According to the picture tag, it was taken in 1980. The Belzer Rebbes son was born in 1975. Your theory is wrong.