I asked them just before Christmas if there were plans for an A4000(T) version, and they replied:
If the A1200 version of DRAGON sells well we will offer an ColdFire
upgrade for users of Mediators for A3000(T) and A4000(T) computers.
This upgrade will consist of the new Core Logic board to be fitted
to these PCI busboards. New Core Logic will include ColdFire MCF5475
with bridge for PCI 66, Flash memory, sockets for DDR SDRAM and
bridge to Zorro III, and many more... It will replace the current
Mediator PCI 4000 Core Logic card.