If this game doesn't have microtransactions, I'll straight up eat my hat.
Edit: Maybe i spoke too soon. I'm not very familiar with the online TCG or the physical->digital card system in place, but you could very well be right that they would stick with that system.
That said, there's too much to be gained from microtransactions, and they know that all too well with Pokémon Go. I stand by my statement regarding the headwear and the mastication thereof.