It would be an interesting time for Sudan and Ethiopia to take a chance and lean on Egypt over water. Instead of leaning, Sudan could always serve as a smuggling point for weapons into Egypt for the Muslim Brotherhood to arm them for a fight versus the military (don't forget Libyan weapons!), and then turn around and fight the weakened victor. If I were the Sudan, I'd call up the Qataris and set something up for an entry point to get heavier missiles to use against tanks and choppers for the MB. There must be some IED expertise to shift their way as well since Syria is neighborhood fighting. Sudan could always just wait out the victor and lean on Egypt, threatening a fight, which by then Egypt may cave on any demand over water use. Patience will win them more than pushing their luck now.
Syria, Libya, Egypt, Turkey, and whomever else is pulled into the flames in the Middle East will not be the start of World War Three. This is the Sunni-Shia civil war unleashed. This is all the MENA regional outcome of knocking over the Taliban, which emboldened our elite leaders to knock off Saddam and start the symphony of
The British did this so much better than us.