Well they are already doing the annual release thing now. Will they restrain themselves? I think it’s unlikely unless they have real concerns about the bubble bursting. Maybe they will not do the Marvel thing which has TWO annually now, but releasing less is another thing entirely. Unless they need that Christmas release window for another product line.
I would prefer Disney release Star Wars films on a bi yearly basis with episodic films coming every 3 years with at least 5 years time separation (IRL) between trilogies. I can’t see them being even this reserved or passive.