Strongest rumours online are that the new coach is Darije Kalezic, born in Switzerland of Montenegrin and Bosnian parentage.
See comments section below this article:
http://www.stuff.co.nz/dominion-post/sport/footbal...
Kalezic's Wikipedia:
https://en.wikipedia.org/wiki/Darije_Kalezi%C4%87
He's a good age at 47 with lots of experience coaching in the Netherlands.
Playing career in Bosnia and in Holland (Eredivisie)
Coached in Eredivisie (De Grafschaap, Roda JC) and Dutch second tier (won the title with De Grafschaap; and he also coached PSV Eindhoven reserve team for two seasons)
Most recently he was coaching Roda JC in the Dutch Eredivisie (until May 2016) and in Saudi Arabia with Al-Taawoun.
Kalezic already had A-League scouting contacts when he was at Roda JC and had three Aussies playing under him there - Tommy Juric, Royston Griffiths and Danny de Silva (ex Perth Glory youngster)
He's never stayed more than two seasons at a single club (coaching as a first team manager since 2009) and was only at Stockport County for two months and Zulte Waregam in the Belgian top flight for half a season.