On display at the Forge World Open Day was an Ork Battlewagon with a Supa-Kannon.
This comprises various parts as a conversion kit (not sure if it will be available as a complete model).
As well as the new GW Battlewagon, I would have thought this would fit on the original Forge World Battlewagon too.
A side view.
This is referred to by Forge World as a Supa-Kannon.
In the Ork Codex there is an upgrade for the Battlewagon which is called the KillKannon. Now is this a different weapon with different stats? At the moment we don’t know, but as a conversion kit for the KillKannon it would appear to fit the bill.
Also at the Open Day were various sketches one of which looks interesting with a Battlewagon with a huge rocket.
Looks like there is going to be some interesting new Ork stuff from Forge World.