Aquaman Not a Sure Thing?

A Variety article talking about the fall makes it sound like The CW (The WB and UPN combo) isn’t so sure about the Aquaman pilot and also mentions Ultra:

Also, the comicbook-themed “Ultra” may wind up being redeveloped for [CBS] netlet the CW… Then there’s the CW, which some believe may head into fall without the one pilot that seemed like a sure thing: “Aquaman.”

Meanwhile, NBC seems to be more certain about Heroes:

At NBC, beyond the already heavy talk on “Friday Night Lights” and “Heroes” (both of which are staffing), talk is swirling around “Raines,” the Graham Yost police drama from NBC U TV that stars Jeff Goldblum.

Source: Variety