There will be no dual-core parts but in case of bad yields AMD can ship quad-core models to OEMs and ODMs. The first Zen processors will not have integrated graphics.
For the entry-level market, AMD will reportedly position the Bristol Ridge APU, which is set to be announced at Computex. Bristol Ridge is believed to be a 28nm shrink of Carrizo, with Socket AM4 and DDR4 memory support.