Sombra's story arc has changed a little bit-instead of having four stories it now has five. The Company We Keep has gone from being a side-sequel to a main story. This in no way changes any potential release dates, only the priority of them. TCWK is now considered to be required reading for said story arc. In case we could not be clearer the order of the main stories now looks like this:
1) Crystalline
2) Tomb Of Magic
3) The Company We Keep
4) Untitled
5) Untitled Arc Finale