One we knew, but we didn’t know which number it was in the set.
According to this post here, it appears the following three Synchros are being reprinted:
BLLR-EN060 Trishula, Dragon of the Ice Barrier
BLLR-EN061 PSY-Framelord Omega
BLLR-EN062 Crystal Wing Synchro Dragon
And all three cards are Secret Rare Reprints.