Maybe we should make
a general thread for new civs being revealed? There is not much to discuss about Aksumites here, or any civ really, if we don't know anything about the gameplay mechanics. Or anything really, just their existence, choice of unit and choice of quarter.
Such thread being separated from general discussion thread would also bring some order.
Anyway, I have correctly predicted that civ for second era - not that there were many well known possibilities from Subsaharan Africa before 500AD

(the only rivals would be still terribly excavated Nok in Nigeria and Punt in Somalia, or second iteration of Nubia).
It is worth noting that they are named not ETHIOPIANS but AKSUMITES.
That means Ethiopia civ on later eras is still probable. Actually I am almost sure it will come back either in modern era or especially industrial era, seeing how it was the only uncolonized African country.
Fun fact, despite still being very very poor, Ethiopia IRL had incredibly fast growth over last 20 years in real GDP PPP per capita, amount of scientific publications, increase in HDI and gender parity index and many other meters. It is also almost the best African nation in reducing dramatic birth rate. It also has very high proportion of women in parliament (40%!) and very low income inequality.
Give it some time and the oldest African nation may be the king of Africa once again.