There is still nothing official, let alone anticipation of the latest Beta version, but it seems that WhatsApp is finally working to introduce a dark theme optimized for OLED displays. The WABetaInfo colleagues have unveiled it and they have also created some concept screenshots to anticipate what could be the final result of the new WhatsApp theme.
A novelty that can instead be formalized concerns the feature of Swipe To Reply.
The feature, activated with the Beta version 2.18.282, resumes what was already introduced years ago with iOS or to make a gesture (a swipe in this case) to quickly replay a message.
As always, the new Beta version of WhatsApp is already available for download on the Play Store and APKMirror.com.