Now, plans sometimes fall through (or are just bad), so "having a plan" is hardly a guarantee of success, but in terms of knowing what they will be able to endure & what they hope to achieve...the IR is far ahead here.
They have every incentive to make the most of this moment. This will not be the last time the US attacks Iran & Israel will never abandon its genocidal mission. Rolling over now would just leave Iran even more vulnerable later.