My best estimate of a desirable target date for the issuers (assuming SEC does not seek to delay it unreasonably) is November 8th, 2014, which is the 10th anniversary of the issuance of GLD. I do not have expert data required to form a mechanism-based timing estimate.
Just for fun...
EQUITY GOLD TRUST filed their S-1 on 13 May 2003. 1 year, 5 months, 3 weeks, 5 days later GLD was issued.
The S-1 for COIN was 1 July 2013. So that would put us on the 27th of December 2014.