Will Arnett appeared last week on The Tonight Show with Jimmy Fallon to hype Teenage Mutant Ninja Turtles ahead of its release, but first he talked about the fifth season of Arrested Development.

“It is going to happen," he said. "We don’t know when, but it is going to happen." You can watch the segment below.

Netflix resurrected the beloved series last year with a series of catch-up episodes, each focusing on a different member of the Bluth clan. For many, the new entries didn't meet expectations, but the fifth season is rumored to feature more interaction among the cast. The trouble here is getting such a large, busy cast together at the same time.

According to Deadline, creator Mitch Hurwitz hasn't presented a script or synopsis,and there might not even be a deal in place.