We posted the figures comprising of 6″ Black Series Wave 20 in the comments for the TVC 2019 Wave 1 article, but here is the official breakdown for TBS Wave 20 currently slated for an April 2019* release.
2x Padmé Amidala
2x Battle Droid
1x Mace Windu
1x Vice Admiral Holdo
1x Han Solo (Mudtrooper)
1x Dryden Vos
*Black Series Archive Wave 1 launches January 2019 with 2 of each figure (Boba Fett, Luke Skywalker, Bossk, IG-88).
UPDATE: Word is that this wave (20) may be available as early as February.