The key word is Iran. An ISlamist Sunni Egypt will still be needed to counterbalance Iran. If US aid will stop, the Saudi's will step in as financier and the Russians (they still do built modern weapons and jets) and/or the Cinese as weapon deliverers. And there still is Iraq and the threat to Israel, Saudi-Arabia, Egypt and the West in general that Shi'ites will take power after US withdrawal. Egypt may be forced to compete with Iran and a future Iraq on who is best bully to Israel to gain support and legitimacy for it's rulers from Egyptian and other Arab populations. But indeed, te solution is peace with the Pals and after that a renewed Israeli-Egyptian bond to counter Iran together, if posiible with PA / Fatah included. Economic integration of Israel in the anti-Iranian Arab camp and therte is Syria to win as welll afer peace. Alas, Israel has become like the Pals were in the past:: chasing a non-possible goal ( Greater Israel like the Pals wanted Greater Palestine), only stalling and cheeting (peace) for that (setllements) while missing opportunities for real peace and security without seeing what harm they bring on their cause for the longterm.
from the article: Mubarak's departure thwarted Israeli strike on Iran