I don't see anyone hiring on any devs formerly from Paragon Studios, unless they're willing to volunteer their help which I seriously doubt. The i23 CoX zombie rez is a server image only, without the tools that would be needed to update or patch it, and I'd imagine a now-10+ year old game (that will never be updated besides) isn't exactly going to be raking in millions a year; its crew is likely going to have volunteer or near-volunteer pay status.
In fact, the idea for APR mainly came about because the original CoX can never be continued or added to, and may eventually lose all compatibility with modern OSs and hardware. And as APR, much like City of Titans, is a completely volunteer crew and is likely to stay that way til darned near launch, I don't see anyone from Paragon Studios being able to be paid (much less anywhere near the money they got back at Paragon) to work on it.