I believe that it sounds somewhat realistic.. namely the idea that the four nations are discussing what to do about retaliatory attacks. Also, Egypt is probably on the worst terms with revolutionary Iran out of all Arab states along with Saudi Arabia, but Egypt maintains the geographical distance not to care too much for the regional consequences.
It doesn't state that all four are colluding about a first strike, and the article states that it doesn't address the initiation of the war.
The U.S and Israel always do contingency planning. This act itself could be a form of grey propaganda to serve the purpose of putting pressure on Iran.
There have been various periods where there has been a media blitz regarding a nearing Israeli strike, and eventually this blitz subsides until it re emerges, and it seems that it's grey propaganda that's distributed indirectly to facilitate the 'diplomatic' process... i.e putting them under pressure.
But outside reporters usually have a superficial understanding of Muslim ties.