concurrent with 6
Would be kind of a wild surprise if this occurs in the same time frame as 6, or immediately after, while Sidney and family are in hiding. And there were rumors that in 6, had Sidney returned, the Kirsch mom would've been assigned to stalking her and taking her down, so we would still be able to see that.
But, big problem is that it would pretty much disallow Gale from returning. And we want her back of course, especially if it's the "final" film. But use her more instead of sidelining her too