I'd be surprised if they start yet another show unless they cancel another. If they spread themselves too thin they could suffer diminishing returns both in terms of talent and in audience retention.
Depending on how things shake out, I suppose it's possible that they could free up a spot by merging 'Luke Cage' & 'Iron Fist into' a 'Heroes for Hire' show in lieu of a second season for each.
Depending on how things shake out, I suppose it's possible that they could free up a spot by merging 'Luke Cage' & 'Iron Fist into' a 'Heroes for Hire' show in lieu of a second season for each.