I kinda have two mentalities about this, on one hand, it kinda makes no sense. There's no Insidious 6 coming any time soon, or ever really, since 5 was supposed to be the last of the series, so it feels like they kinda missed the boat, and on top of that we've already seen a maze for 1 and 2, 1-3, and 1-4, do we really need 1-5? Or even just 5 since it's so derivative? In my opinion no, but who knows.
On the other hand, 5 did make a good amount of money, and it's been 7 years since the last maze, so maybe similar to Saw back in 2017 they feel thats opportune enough even if it's heavily derivative. If we're lucky and that's true, hopefully it'll just be in a blumhouse mashup. I know we're probably tired of blumhouse mashups too, but I'll take half of a basically repeated insidious maze paired with something new over it getting its own slot.