I think the wording on the WSJ article is unclear and the more likely scenario is that the iPhone will continue to have a Lightning port but that the power adapter will have a USB-C port, i.e., a USB-C to Lightning cable will replace the USB-A to Lightning cable.
I hope not. The Lightning port is excessively prone to corruption. You can replace a cable when it goes bad, but I've had to replace two nanos because of port corruption.
How can you do 'New Math' problems with an 'Old Math' mind? -- Charles Schulz