There are rumors going on that a large new model coming out will be a Monstrous Creature similar to a Dreadknight. However, in today's rumor we have a an actual walker rumor. Are these two rumors talking about the same unit? Who knows, it is quite possible that both are being playtested.
Here is the bit. Please remember that this is a rumor.
via Stickmonkey on Bols Lounge
Dual (not linked) Rail Cannons
Many upgrade options including Stealth
BONUS Tasty Morsel:
Markerlights gain the ability to grant Skyfire.