At current, the strategy to fight ISIS is to allow Iran greater and greater influence over the what's left of the state of IRAQ http://www.nytimes.com/2015/03/06/world/....html?_r=0

 

If that strategy comes to fruition over the next ten years (the time frame we were talking about) then that means that you will have a stronger Iran and an Iraq that will at least be under their direct influence, indebted to their military assistance if not annexed directly.  

 

Also as above, the deal itself allows for the expansion of their capability to buy conventional weapons and long range delivery systems for their future nuclear arsenal.  Not to mention, that with the imminent influx of 150 billion dollars Iran's top general is already meeting with Russian leaders about buying weapons with their new forund wealth against current international sanctions.  

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