That is impossible to tell right now, but it cannot be a triangle in wave 2. If we see a triangle then my labeling 1-2 is wrong and it must be an ABC instead.
It looks like a 3-3 correction, so it can morph into 3-3-3 (WXY) or 3-3-5 (ABC). It is not important to know which one it will be, because the targets are approx. the same. 3-3-3 is a little more rare than 3-3-5.