What would happen to Egypt when Mubarak step down?

I think radical Islamists will seize power. History shows that in majority muslim nations secularism has to be maintained by force to stop Islamic revolutions from occurring. Turkey is the most democratic and human rights respecting muslim country and this is due to it's fiercely secular military and westernized culture. I don't think there are strong enough secularist cultural or military forces in Egypt to stop the Islamists.