A South Korean media outlet says that Samsung is planning to release the Galaxy S21 series early. Its launch could be pushed to as early as late December 2020, but January 2021 seems more likely. The report also states that the Galaxy S21 Ultra will ship with an S Pen.
https://www.notebookcheck.net/Samsung-Galaxy-S21-series-likely-to-be-released-in-January-2021.498095.0.html
Turns out 2100 and 1080 are in the same generation...! Who could've known?!