Doesn't the GNX revival rumor come around a couple times a year...every year? I swear we had a thread for it a few months ago.
Its been an ongoing thing since the Pontiac G8 showed up what feels like a decade ago. Its gone from a full-size sedan, to a hard top convertible coupe, to a regular coupe, back to a sedan, and then both a sedan and coupe. Sizes have varied wildly, from a big Zeta sized model down to something ATS sized, based on the Alpha. Engine options have almost universally been turbo V6s, though. So, that's nice.
They've got two problems that they'd have to solve, first:
1. Which size of the Alpha chassis do they use?
2. Coupe or sedan?
3. Which version of the 3.6T do they use? Or do they cook up their own tune?
4. Do they put an emphasis on comfort or performance?
Because, honestly, GM has a lot on their plate in light of a GN with the ATS-V, CTS V-Sport, Camaro, and SS Sedan. Fitting both a GN and possibly a GNX in the mix, let alone Buick's already premium/luxury/quiet/blah blah blah offerings could be difficult. Would I love it? Absolutely. They should do it. But, man, I totally would understand if they didn't.