They had old scripts in the pipeline. A number of projects in the works will be halted immediately.

TFA cites actors not doing publicity for projects that are in the can and awaiting release. The film can still be shown, but with less promotion is expected to do less well.

I think this helps disempower scabs. Plenty of non union people would love for s studio to pic of their script, or the studio might pull an old script out of the bin

Scene for Scene remakes would be preferred to them ruining good classics by "reimaging them" for the modern era with new scripts

Watching Hollywood movies it seems they can do it most of the time.