They will be moving to Singapore soon. 

Explanation-The time soon represents the future continuous time action and we know that only time decide the tense. In future continuous tense we use Will/shall + be + v1+ing, as we know will and shall represent the probable action for the future time and they are also modals. So, with modals we use base form of the verb so we use ‘Be’ with will and shall and to make it continuous we use V1+ing. Therefore, Will be moving is correct. So the given statement is correct.