All of them, honestly, though, if doing a hypothetical retrospective once all are released, I'll probably drop the FPS and Wild Rift first, since I suck at FPS' and I fall off mobile mobas fast. I'm interested in the Card Game since I kind of like them, but none of the contemporary ones have worlds I care about, like Hearth, Gwent or Elder Scrolls.
The Fighting one is the one I'm most interested in though, since, as a Top Laner, I live for the 1v1s. If they announce Fiora too, I wouldn't be strong enough to resist.