Whether a crossover would reinvigorate the Insidious and Sinister franchises is a different question altogether.
We almost did Insidious and Sinister and I still feel like we might do that so, I think so.
With a third Sinister movie looking unlikely at this stage, and Insidious: The Last Key attracting some particularly brutal reviews, it could be time to shake up both series.
A crossover between horror movie franchises Insidious and Sinister is very much on the cards according to Jason Blum, a producer on both properties.