Borg are failed synths, like cancer to the universe. They seek perfection and that’s what the twins are.IMHO there are two big problems with this fan theory.
1. The Borg are not synthetic life - they are augmented biological life.
2. In terms of off-camera stuff, Stewart only agreed to having the Borg being included in this series if the plotline would not involve any "typical Borg" elements, because they've been done to death. I think the resurrection of the Borg as their historic existential threat would thus be a nonstarter for him.
My theory absolutely is vastly different than any previous Borg stuff. I am sure Stewart would be ok with it as long as he was able to get his preferred social messages out via the show.