TheOneRing.Net posted a cryptic Tweet advising anyone who can attend WonderCon 2019 in Anaheim that they should try to do so.
WonderCon 2019 will be held March 19-21 at the Anaheim Convention Center. I couldn't tell if they are just trying to round up fans for a good time or if they have a special reveal. Sometimes TORN is allowed to reveal information about upcoming productions under embargo, but sometimes they just arrange a nice big party for Tolkien fans.
I'll keep an eye out for updates.
The 3-day schedule does include a couple of Tolkien panels but I don't see any hints in the panel names.