I spoke with one of the shops which stock Hot Toys in the US a couple of years ago. He gave me some insight into how the Hot Toys game works.
Hot Toys does not sit down and say "OK, for this figure X I think we should make 5000. Then for this figure Y, let's make 8000". It is ALL based on pre-orders. It's essentially no different to anyone doing a custom project run. You gauge interest, make a list of the number of people who want the item and order materials etc accordingly. It's also the best way to order your inventory and materials needed for each figure and minimise on waste.
Sure distributors like Sideshow will order more for themselves to have some in stock, and there would be a certain percentage extra for spares, etc etc. But in the end it is pre-orders (or sales) which drive the numbers.
Consider yourself the owner of Hot Toys, and you need money to keep things going. Would you be making more figures from franchises that sell (with high pre-orders) or ones from those with low pre-orders ?
Sure it's hard to judge Asian interest from our Western perspective as well. Asian pre-order numbers may look totally different. But I considering Hot Toys was pretty much founded on Iron Man, I could guarantee that a lot more Asians are Marvel fans than DC fans.
But in the end it still comes back to WB for me. Snyder had even proposed an Atom movie spinning off from the Ryan Choi (scientist in the Victors dad's lab) character which was set up in JL. This would have been filmed in China with a predominantly chinese cast, director etc. Imagine what that would have done for Asian interest and $$. But WB weren't interested. This was of course years ago, way before "Shang-Chi and the Legend of the Ten Rings" was even being considered by Marvel.
So once again WB ****ed it up, the bumbling fools that they are. This in turn affects DC popularity/pre-orders and the figures we do/don't get.