NVIDIA has reportedly cancelled its plans for the SHIELD 2 Tablet, which would have been the successor to the popular and astoundingly affordable gaming-focused SHIELD Tablet K1 that launched in 2015. This is of course, just a rumor at this point since no official confirmation has been made available from the company, but it seems entirely likely and quite plausible given the image of the document that NVIDIA appears to have sent off to the FCC, asking that they dismiss their request for a grant on the device due to cancellation of the plans to produce the tablet. The document does not mention any reasons for the cancellation other than for "business reasons," so it's very unclear as to why NVIDIA has shut down any further progress on this device.
The last time that a possible SHIELD Tablet K1 successor was heard of or mentioned was back in the middle of July, when an unknown NVIDIA device passed through the FCC. It was labeled with model number P2523, but there wasn't much more information to go on from the FCC details, save for the measurements which were listed as 8.6 x 4.8 x 0.3 inches. Since NVIDIA's SHIELD Android TV unit features an NVIDIA Tegra X1 processor, many interested users were hoping for a SHIELD 2 Tablet featuring the same processor to give it some additional power in the gaming department and a boost up from the currently available Tegra K1-powered model. This also would have opened up the device to a handful of games which are only available for the NVIDIA SHIELD Android TV, like Metal Gear Rising: Revengeance.
With no explanation from NVIDIA on why they appear to have cancelled the device (which was speculated to be in the works, but never confirmed) there are likely at least a few reasons for their decision. The lack of sales on their past two tablets could have played a role in choosing to cancel a future tablet, or it could be that they had decided on a completely different tablet and may need to resubmit a new grant request. Anything is technically possible here. If the SHIELD 2 Tablet has in fact been cancelled, whether or not NVIDIA still has plans for a follow up device remains uncertain even if a follow up were to be further in the future.