It is a possibility BUT is also highly unlikely. USCIS very recently published a new EB-5 rule dealing with cases that have been on hold for over 10 years (13 to 16 years). THOSE folks are highly likely to be interviewed if they have not already been or even if they have they might be again.
USCIS reserves the right to refer an investor to an interview conducted by a USCIS District Office at the I-829 stage.
No interview is required at the I-829 stage.