Here you go:
You will absolutely see a way to create a precursor available in the future. As detailed in our plans for the second half of the year here:
As mentioned at the end of the blog, as always things are subject to change as test and prepare various systems. Most of the stuff covered in the blog you’ve already seen implemented, or steps towards being implemented, however the precursor building (and corresponding additional legendary items) is the one highest at risk to not make it this year.
It is still something we absolutely plan to do!