Is the Ent in Orthanc Supposed to be Treebeard?

[Faefrost]

I think they deliberately left it vague and open to the builders interpretation. It clearly could be Treebeard, but by not naming him it leaves open the possibility of them making a stand alone Treebeard set with him, Merry and Pippin in some future wave. Naming him in the Orthanc set doesn't really impact sales of that set. But by not naming him in it, it keeps any future set as a more desirable must have.

[Deathleech]

How about Quickbeam? (An important Ent in the book). Looks close to the Lego version.

Quickbeam sorta looks like the ent in Orthanc, but his beard doesn't seem as pronounced. He does have a similar body shape though. He is probably the next closest after Treebeard

Orc Pitmaster is more of a rank than a character name. Here you go generic mordor orc #723, here's a big axe and a grappling hook, you are now the Pitmaster of Orthanc, enjoy your new job!

Right, but the point was they have the exact same figure and are trying to sell it as two different types of orcs. It doesn't matter if he is a special character or not, he is named something different but there is literally no differentiating him from any other Mordor Orc released so far.