First we had Mega Man Legacy Collection 1 + 2, then a pair of Mega Man X Legacy Collection sets.
That means the collection packs in the first four Mega Man Zero games along with Mega Man ZX and Mega Man ZX Advent.
Now, following an earlier leak, the saga officially continues with Mega Man Zero/ZX Legacy Collection, which brings six games together on PS4, Xbox One, Switch, and PC on January 21, 2020.