It seems that Apple is preparing to release a new power adapter with two USB Type-C ports. While its release date remains unknown, its design, peak wattage and pricing have emerged.
https://www.notebookcheck.net/Apple-Dual-USB-C-Port-power-adapter-leaks-with-design-wattage-and-potential-pricing-outlined.613775.0.html
Looks like a piece of junk. Never buy a power charger with rotatable prongs. I had one break off and the prong stuck out of the power outlet. Very prone to electrocution! Always go with chargers with the prongs stuck in place!! Or if you're going to use one with rotatable prongs, just leave them stick out, never put them back. Keep swinging them back and forth and they will break one day while you're trying to unplug from wall outlet.