diff --git a/doc/backlog.md b/doc/backlog.md
index 3bbea94..8fd862a 100644
--- a/doc/backlog.md
+++ b/doc/backlog.md
@@ -1,6 +1,7 @@
 # Backlog
 
 ## Iteration +1
+- Naming things: reX9
 - HAFAS: Fix return journey wrt. arrival time
 - HAFAS: Parse and render remarks
 - Add tabular timetable rendering
@@ -8,3 +9,10 @@
 ## Iteration +2
 - Add `rex discover` for regional discovery travels
 - Find cellular coverage API
+
+## Iteration +3
+- Travel time maps
+- "Live" updates (while traveling)
+- Zugwechsel gewichten durch Chance vs. Risiko, weniger oder mehr besetzte Züge zu erreichen
+- in-memory graph library mit Rust, um ins Routing einzusteigen. Vorher "opentripplanner" und Umfeld checken.
+- Travel guide about "nearby POIs" with speech synthesis