My understanding is that it is going to be done with less - but the stretch between Duncan and King is going to wait for Mirvish-Gehry to be done.
Essentially my timeline understanding is as follows:
2018: Utility relocations north of Queen
2019: reconstruction north of queen, utility relocations south to King St.
2020: reconstruction from Queen to Duncan, utility relocations from King to Front
2021: Construction from King to Front
2022: nothing, waiting for Mirvish-Gehry
2023: completion between Duncan and King.