The LFL Holocron Keeper Leland Chee recently sent fans into full speculation mode after the following reply to a fans tweet. As he mentions "If Tag & Bink can show up, anything is possible". I can picture this on a sticky note in his cube at work.
He also mentions characters as in more than one so I wonder who it might be? I guess the "coming months" will tell.
You wouldn’t believe some of the Legends characters that will be cropping up in various media in the coming months. Hey, if Tag & Bink can show up, ANYthing is possible.— Leland Chee (@HolocronKeeper) January 20, 2018
4/15 - Star Wars Celebration Orlando (2017)
4/16 - Star Wars Celebration Anaheim (2015)
4/18 - Clive Revill
4/18 - Benedict Taylor
4/19 - Hayden Christensen
4/20 - Andy Serkis
4/22 - Mark Jones
4/24 - Claire Davenport
4/26 - Andrew Secombe