After years of warlordism and anarchy, a motivated fighting force arises and routs its enemies, spreading across the country and maintaining order. This force happens to be Islamist, meaning its people are Muslims fighting to create a society based on Islamic rules.
Within months, neighboring Ethopia intervenes in aid of the lameduck "government" by sending troops and maanges to defeat the Islamist forces. Then US air units launch attacks on these Islamists, claiming the death of Al-Qaeda members. This article describes the US interest and involvement in this conflict.
As much as some might think the American/Ethiopian-backed forces and their defeat of the Islamists will bring a new order and peace for the country, I believe the experience will be similar to Afghanistan where despite a central government put in place and backed by the US. instability and conflict still abounds with a resurgent and durable Taliban active in parts of the country. A significant difference is that in Somalia, the Islamists probably represent the interests of many of the population and are not as primitive and oppressive as the Taliban.