Why wouldn't it be? Hot Toys will take every opportunity to sell a figure twice. I wouldn't be able to pass on this, even with the figure included. Is it odd that Plastic Enemies teases this before Hot Toys
From what I can gather online, there isn't anything differentiating this MK IV from the other so a lot of people are thinking that this will just be the bots.
If HT were smart they'd include a full tuxedo so if people wanted they could kitbash a Stark Expo Tony with just a True Type and of course the original Mark IV.
Plastic Enemies is a blog that usually gets the jump on Hot Toys releases. They broke Sucker Punch, this year's Con Exclusives, Spider-Man, New Goblin, just about everything we eventually see from HT.