Are there plans to sell them or will they be used for the car trains or other traffic at some future point or scrapped?
They are not compatable with the car trains. When acquired from SBB the contract stipulated they could not be used for BLS freight. It is possible they will go to a private operator. There is an unconfirmed report that SERSA will acquire one of more additional Re 4/4 II (they already have ex BLS 503)