Which does not guarantee him any place in defeating Imu or having any greater role period. He’s a D. Who is trying to conquer the world lol. He can just as easily be Xebec’s son as well as having deep ties to the void century. It’s speculation but we know he has a unique physical body, which fits every other special lineage character. All of whom have void century ties. He’s special but not wholly unique. King even waited for Joyboy and Kuma prayed for Nika lol
He’s special among Luffy’s pirate antagonists but again, everything he has is racing for a Laugh Tale end game for his character.
The only shred, tiny shred, of chance is the fact he wants to join the WG as well, but we already know he can’t overthrow it per Whitebeard and common sense tells us Teach can’t simply replace a 900 year old, dark age invoking immortal monarch.
Which leaves the obvious outcome (so far) being he’s the final obstacle for Luffy before Luffy is PK.