CALM THE FUCK DOWN.
We don’t know for certain if this is set-in-stone. Hell, we don’t even know if Grojband is even coming back for a second season AT ALL.
And who knows? Maybe Laney’s new love interest will just be using her (think Prince Hans from Frozen) or some other neat twist.
That’s the thing with cartoons: What seems predictable at first may throw you a curveball.