Agreed, the generic would also need to be able to :
(i)source the supply of API at a time where Amarin has cornered the market;and (ii) manufacture a bio equivalent product which will not be easy with a product like this.
Finally, the margins on this are not stellar compared to most drugs so the risk / reward may not stack up for a generic company.
..........and don't forget the statin/ vascepa combo product 3/4 years down the line.