Can current investments (investments prior to application for the visa) be counted towards the AUD5million complying significant investment or the AUD15million complying premium investment?

No. From 1 July 2015, applicants for the Significant Investor visa and Premium Investor visa will be required to make a new investment to be eligible for the subclass 188 visa. The investment should be made after the applicant applies for the visa, but prior to visa grant. The Department will advise you when to make the investment.