diff --git a/embark.el b/embark.el
index c06c730e..ccbf9647 100644
--- a/embark.el
+++ b/embark.el
@@ -718,6 +718,9 @@ There are three kinds:
 - :live, which does
 - :completions, which also auto-updates, but is ephemeral.")
 
+;; TODO Do we need this variable?
+;; Also add a list of marked candidates, or a list of overlays?
+;; When switching the display modes we have to move the overlays too.
 (defvar-local embark-collect-candidates nil
   "List of candidates in current collect buffer.")