Here are three more "trinitarian scenarios" - all suggesting somewhat different outcomes (on which, no one is placing bets).

Washington Post - ANALYSIS, Three possible scenarios for Egypt's future, By Glenn Kessler, Friday, February 4, 2011

As the Egyptian political crisis grows more violent and uncertain, analysts have begun to turn to historical parallels for answers. Will an Islamist movement or a new strongman - or both - emerge to seize control, in an eerie repeat of the 1979 Iranian revolution? Or will Egypt's secular tradition and powerful military allow for a messy transition to democracy, as happened in Indonesia in 1998? Or will it be something in between, such as the initial outcome of the Romanian revolution of 1989? ... (more in the article)
Huffington Post - Egypt: Possible Scenarios, Amir Madani, Author, Le Letture Persiane, Posted: February 2, 2011:

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There are three sets of players in the Egyptian scene right now...

The first players are the members of the ruling elite, supported by security forces and an army which, still as this article is written, has Mubarak's face as its symbol. There may be other faces symbolizing power in the future, but these too will be military ones. The military is Egypt's most powerful institution and one embedded deeply in all aspects of life. It will do its best to retain its purpose and power. In order to make sure that his regime stays in power, Mubarak resorted to a coup in which he appointed Omar Suleiman, his right-hand man and the country's intelligence chief, as vice-president.
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The second player in this scenario are the Egyptian people: millions of men, women, youth, workers, intellectuals, writers, journalists, and ordinary citizens who demand rights and freedom and aware of the dangers of sectarianism. The best-known opposition figure is Dr. ElBaradei, a moderate diplomat who was awarded the Nobel Peace Prize in 2005 for his working in leading the United Nations' nuclear watchdog. A headline recently read: "El Baradei asks Obama: Take Egypt's Mubarak off life support." Other prominent figures like the jurist Ayman Nour and Osama al-Ghazali Harb have also struggled to build popular followings. But there could emerge other figures from the wider civil society and from the ranks of Kefayah (Enough) as well.
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The Islamists are the third set of players. Egyptian Islamism (like all social phenomena) is complex and divided. It encompasses a myriad of trends, ranging from enlightened moderates to extremists who exploit the concept of jihad (originally based on catharsis) and promise a land of desolation. The Muslim Brotherhood could be expected to win a large part of the vote in any fair election as it is rooted in Islamic society and has gained a certain popularity for the work of its charities.
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Here are some possible scenarios for how the situation could play out among these groups.

One scenario that could play out is a clash between the ruling elite (with or without Mubarak) and the elements of civil society. In this scenario, the ruling elite will promise formal security and stability by fighting the fundamentalists, and will continue to receive aid from the US, the support of Israel. It would be shock therapy, a treatment resolution that promises future explosions.

The second scenario is the emergence of a power vacuum that could lead to some form of civil war and a Lebanization of Egypt; a sort of chaos in which armed fundamentalist groups might thrive and the army would need to take over the running of the state, but without the necessary forces to defeat them. This scenario, which is the wishful thinking of the enemies of Egypt, would certainly be prevented by the Egyptians themselves. As Amr Shalakany wrote from in Tahrir Square in Cairo: "This is a sweet, sweet revolution; it is peaceful. Tell everyone we are peaceful." And the government has offered talks with protesters after the army said it will not fire on them.

A third scenario is that the army, as the key institution, indicates to Mubarak that he must resign as he is a cause of instability. In this case, the army takes charge of the country's security. In such a scenario, chaos and violence are avoided, and Mr. Mubarak could leave gradually. This would allow the necessary time to exclude President Mubarak and his closet associates, but also to let the surviving parts of the ruling system exist as warrant to prevent fundamentalist groups from flourishing. This is probably what Washington means by an "orderly transition." In this scenario, Mohamed ElBaradei (or another figure) could emerge as a compromise to oversee the transition and a free and fair election for the presidency and parliament. This could only happen if only the Egyptians decide to follow through along this path. ... (again, more in the article)
BBC News - Egypt unrest: Possible scenarios, By Tarik Kafala, BBC News, 31 January 2011:

For Egyptians, and the millions of Arabs watching closely across the Middle East, these are hugely exciting times. But for all the hope for change, there are also enormous dangers. These are three broad scenarios that could result from the events in Egypt.

CUT AND RUN: MUBARAK GIVES UP PRESIDENCY
.... (explanation and analysis)
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STICK TO HIS GUNS: MILITARY AND POLICE CRUSH PROTESTS
.... (explanation and analysis)
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TRANSITION: PROMISE TO LEAVE, OPPOSITION JOINS GOVERNMENT
.... (explanation and analysis)
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Regards

Mike