a related official source, there is legitimate wiggle room when it comes to an official announcement. So there's no need for fans to fret just yet.

The last announcement was made in the midst of filming Season 3, so the team could choose to wait until they're on set again to share the big news. And that could take time, considering according to Dreymon and the show's Twitter account, all of the snowy, windy, and rainy weather conditions that are captured throughout the show are 100 percent real. According to Radio Times, the main set of the show is located on "about eight acres just outside Budapest in Hungary." So who knows, they could be waiting for snowfall before revealing the big news.Burkhardt quartic

In mathematics, the Burkhardt quartic is a quartic threefold in 4-dimensional projective space studied by , 
with the maximum possible number of 45 nodes.

Definition
The equations defining the Burkhardt quartic become simpler if it is embedded in P5 rather than P4.
In this case it can be defined by the equations σ1 = σ4 = 0, where σi is the ith elementary symmetric function of the coordinates (x0 : x1 : x2 : x3 : x4 : x5) of P5.

Properties
The automorphism group of the Burkhardt quartic is the Burkhardt group U4(2) = PSp4(3), a simple group of order 25920, which is isomorphic to a subgroup of index 2 in the Weyl group of E6.

The Burkhardt quartic is rational and furthermore birationally equivalent to a compactification of the Siegel modular