Again we are starting to get bits and pieces of rules from the upcoming Ork Codex release, and this is where it gets exciting. Also mentioned again, is that Stompa's are in the book, showing that Lords of War are in.
Please remember that these are rumors from the Ork codex.
via an anonymous source on Faeit 212
There will be rule called green mob
If Orks fail there leadership check they have to roll on the (in
german) "grĂ¼ner Mob Tabelle" something like "green mob spreadsheet" (new
mob rule)
where a result of 1 ignores the missed LDCheck or on other results the unit
run away or have a little battle on each other.
Bosspole gives you a reroll of this green mob table.
Stompas are in the book as Lord of war