Ethiopia and Portugal end up making moves against the Somali states, with Portugal taking certain port cities like Mongdaishu. Ethiopia, if it gains what is today the Somaliland region, could potentially develop it's naval force, but considering iirc Ethiopia has never really had a major naval force, it would have to be relient on European aid. While Portugal would probably be like "haha no" for a good while, since it doesn't want competition in the Indian ocean, as the Dutch/English/French/Spanish/Scottish/Genovese/Omani/etc make their way more into the region, Portugal may be more willing to bolster Ethiopia's naval tradition.
In any case. Ethiopia is gonna be probably more focused on Nubia than anything, since either the Mamluks or the Ottomans are going to be expanding in the area.