I can find several things that require a "willing suspension of disbelief."

First, the best genetically altered disease agent requires a way to get it to the target, the same as any other weapon. No mention is made of how Iran would get a mutated virus into another country.

Secondly, biowarfare isn't reliable as it's just as likely to kill your own people as those of the enemy.

Thirdly, an assault ship carries a limited number of fighting men and equipment -- they are are intended to be used in groups. None of the task forces mentioned include enough assault ships to do a good job of taking and holding ground, and that's something that missiles and bombs don't do well at all, and they sure as heck aren't going to use sailors to assault shore installations.

Fourthly, the US is stretched so thin that it could not supply the the necessary manpower to hold what assault groups might take.

I'm not saying that this isn't true or that nasty plans aren't afoot, but I've got my doubts about how it would be done.