so it's confirmed that Buggy and Blackbeard are brothers

Rocks died 38 years ago, Buggy is 39, he left him behind before God Valley

it's Buggy's theme that he falls upwards because people find out he's related to every historic pirate (Roger's crew, friend with yonkos etc) so now that Rocks is becoming relevant again in OP's world everybody will find out that Buggy is his son and freak out like they did before for his other relationships

he'll be the one to meet Imu again