The last snowball earth was about 700 million years ago.
The article mentions that we are entering a Super Grand Solar Minimum.
The article says that these Super Grand Solar Minimums "recur approximately every 2000 years".
According to the above graph, earths temperature over the last 500 million year has never been anywhere 2 degrees C.
My point still holds. The article says that "at the bottom of this ice age period in 200 years’ time, the average temperature on Earth will be 2C". Given the above temperature history and given the supposed duration of the Super Grand Solar Minimum cycle, I believe that the article is in error. The article should have said that the average temperature will drop about 2 degrees C.