Southwest has Lagos state
South east has Enugu
North has Sokoto.

Likely candidates for capital of south south.

Benin city in Edo state

Port Harcourt in river state

Warri in delta state.

The answer in Benin city, here's why.

Ikwerre(majority in river state is from present Edo)

Urhobo from Edo

Ishekri from Edo

Isoko from Edo, all in delta.

The present day Benin is strategically position in between north,east, south and west as a road to all regions.

Edo nation is currently ruling 3 states in Nigeria.

What do you think?

By the way ilage is part of the Edo nation, obj created us but that will be corrected