Unless the son is someone strong, there is no need to hype him so soon
In one piece, there are many scenarios where the father is super mega strong yet the son is a dissapointment!!!
Roger the PK, apparently Top 1 in verse of all time until now. His son? Lost to Yami Teach. Got murdered by Admiral in minutes if not seconds
Oden the Dragon wounder. His son? Trash.
Yasopp the Big 3 of Shanks' man? His son? A coward that is weakest in his crew.
Kyros, the legendary gladiator in Dressrosa. Not son, but his daughter? Fodder.
Atm best scenario Oda can pull of is only his son is Jack.
Proof:
1. Similar design and clothing
2. Jack is 28 years old, same age with Momo if he doesn't time travel
3. Same brutality and simbolism of Raw Power
But why Kaido wants Jack to meet Big Mom?
Easy. The other 2 Calamities have handed her Ls, it's Jack's turn now. All according to formula.