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"Capcom-esque microtransactions post-launch after reviews have come out and everyone has had their hands on the game."
(hexbear.net)
The one thing that isn't mentioned is how these Tekken Coins will be bundled. Take Street Fighter 6's paid costumes: The skins Capcom added back in December cost 300 Fighter Coins, which is around $6 each. Except you can't buy bundles of 300 Fighter Coins. The minimum is 250, meaning you'd have to spend around $10 just to secure one costume. I wouldn't be surprised if Tekken 8 takes a similar approach, meaning that the actual money required to procure cosmetics is higher.
Fighting games in particular are a small enough niche that I could see many not even earning back the cost of development through base sales, nevermind being high enough to please porky.