O MacRumors has just reported that ClubMac, an online reseller for Apple, is currently running an image of the box of a Time Capsule with 2TB capacity, currently nonexistent / unannounced by the company.
The photo appears in the descriptive area of ??both the 500GB (US $ 300) and 1TB (US $ 500) models, both updated at the beginning of last month. For this reason, it is difficult to say that Ma would announce a third party for now, unless it came in costing more than the current top-of-the-line model ($ 700, who knows).
Still, the question remains, since Apple itself distributes these promotional images to partners and media outlets. The obvious evolution remains to be seen when it will happen.