I’ve been thinking about a possible connection between Oars, Blackbeard, and Rocks D. Xebec.
Oars is confirmed to have died in the Land of Ice, an unknown winter island, Blackbeard was born on a winter island.
Rocks D. Xebec had his base at Hachinosu (Pirate Island), and considering his obsession with forbidden knowledge and power, could he have been looking for ancient giants like Oars for some bigger plan?
If so, maybe Rocks went to the Land of Ice looking for remnants of the Ancient Giant lineage… and possibly met Blackbeard’s mother there.
The winter island where Oars died and Blackbeard’s birthplace are the same—or at least neighboring.