Macrumors loves its clickbait sensationalized pre-drawn-conclusion articles.
But, I already expected the 5c to go out of production next year as there simply won't be any room left to price it. Its value has already hit "$0" on contract, and there is no where to go from there.
I am kind of hopeful that Apple keeps a tight reign on the iPhone lineup. I really do not want to see the utter messiness of iPhone 6, iPhone 6s, iPhone 6+, iPhone 6s+ at confusing $99, $199, $199, and $299 price points.
Personally what I think Apple should do is make the 6s and 6s+ at $199 and $299, and take the A8 chip and camera from the old 6 and stick it in the 5c shell with a new line of colors, and price that at $0 and $99 for 8 or 16 GB.
There is still a demand for the 4" iPhone, and Apple will need to fill that demand through at least 2016.