Highly doubtful since one is already launched and well along out fitting and the second is well along being built both in France and Russia. IMHO, there will definitely be two.Looks like Russians are having second thoughts . Recent news are they want only two Mistrals (or even just one) - those that they already payed .
The second two are still questionable...but if Russia wants the advantage of that type of shipbuilding, they will build them.