Jack Silkstone recently uploaded a video on the new Thorpe Park merch available. At the end of the video there was a teaser for a new video that will be outlining some of the changes for the 2020 season.
This will likely be mainly specific changes Thorpe have made due to Covid-19, however there was a shot of Slammer for a second. I doubt this means anything in the way of a reopening but I find it interesting nonetheless.
Even if it's just about Covid-19 changes I still think it may have some useful information in there for anyone visiting soon.
The video is linked here: https://youtu.be/gvPmWjgukO8