+ Iran + SAA, all together. US opinion also matters. Turkey is in NATO and US is daddy of NATO. Not sure US will be upset with Turkey being in northern Syria. Turkey occupying northern Syria is also violation of international law, and since Turkey is a law abiding state, we can assume Turkey is conscious of that and probably knows violating that law will most likely be a short term game plan.
So NATO/US has put the handcuffs on Turkey? Thats what this things you're saying sounds like.
They have a very good chance. The only thing Egypt needs to fight a good war is money. Egypt has "friends"that will cough up money.The ones that have money usually dont have good militaries, and the ones with less money, tend to have good military power, so they could trade and fill each others' gaps.
Iran isn't trustworthy? Well lets analyze that part. Considering Israel is the target of the "cooperation", how would Turkey and Iran be able to target Israel considering Turkey IS in NATO aka US and US is a strong ally of Israel? In such a situation Turkey is the unreliable one, because for Turkey, attacking Israel means attacking a friend of a friend(US) you are in a strong alliance with. Reverse the countries and i think you would be right.
Turkey can have beef with Israel, but by virtue of being in NATO, Turkey cannot go to war with Israel. if TUrkey does EU+ US will destroy Turkey. You've made your bed, now lie in it.
The biggest incident TUrkey has had with Israel is the Marvi Mara incident. After that there's nothing serious imo. No offense Turkey!