Provided that you did not buy your coins from the thief who dumped them at a low price, you don't need to do anything. You will automatically be allocated your fair and correct share of new tokens (I think).
It is only those people who had low priced buy orders and inadvertently bought from the thief who need concern themselves with what might happen to their coins. Although, it is a concern to us all, since it affects the value of our legitimate holdings.