You'd have think they'd have discontinued the rock up considering it's sales were poor, it was more expensive, and the only thing it has that other UPs don't is some plastic styling trims and some stickers.
If the GT is going to be announced it would surely be better to replace the model that's crap (price vis car) and the most expensive with a model that's good and also the most expensive?
Unless they're looking to get rid of both the rock and groove up and subsume those market spheres into the GT? Or they want to make the rock up the sort of 'non-premium' but almost good looking GT that you can get a grand or so cheaper? I dunno.