That's my concern as well.Myself, I can't see them creating new Aliens OR Predators that they have already released in 1:3 or "a bit bigger than 1:3" just to get scales to match. I wouldn't have thought that folks would be interested in paying the associated prices just for a different pose and a few inches difference? (for clarity - I'm talking about statues here, not Pamela Anderson).
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I wouldn't have expected them to plan the 1/3 Predator line back in early 2019 when they announced the City Hunter wall art or even when they revealed their Big Chap and Warrior later that year. But even when that smaller line was the only one in the plans, I'd have taken greater care to make sure the bases and sizes were closer to each other because most people would want to display the line together. Still boggles my mind that this kind of cohesion was missing from the get-go. Either people will respond with "Finally, now I can pull the trigger" or "Why would I get this now?"