That is a very powerful looking engine, and the faceless mask certainly inspires a feeling of dread.
As they had previously mentioned, this is a plastic kit with resin upgrades. However, you have to buy the whole kit and not just the upgrades themselves.
Anyone who knows the lore of the Ordo Sinister already knew the left arm option would be locked to the Sinistramanus Tenebrae, but it looks like you'll be able to swap carapace and right arm weapons to your choosing, not just what is in the kit.
According to Forge World:
– 1x Adeptus Titanicus Warlord Battle Titan with Plasma Annihilator and Arioch Power Claw. This 144-part plastic kit builds a towering god-machine and includes optional extras. It is supplied with a 120mm oval base.
– 23 resin components to turn your Warlord into a Warlord-Sinister Psi-Titan
– 8 Warlord Sinister Psi-Titan weapons cards: 1x apocalypse missile launchers, 2x belicosa volcano cannon, 1x paired laser blasters, 2x sunfury plasma annihilators, 1x Arioch Titan power claw, 1x Sistramanus Tenebrae
– 1x Warlord-Sinister Psi-Titan command terminal
As mentioned previously, we'll have a full look at the rules a bit later on. For now, this should be enough to whet your appetite.