Yeah, I figure Nicieza was probably being truthful upon thought. I hope it wasn't my comment that turned him onto the idea, I just wanted to hear it wasn't in continuity, I certainly wasn't hoping to see the powers again.
Still, this creates more plot holes than it solves. If InvisibleSteph! from GU is in continuity, so is her fight with Tim. So why hasn't Tim ever mentioned it, especially upon seeing her return? And why didn't Steph use these amazing powers while she was fighting the general, or during the gang stuff? And why is Tim talking like she just got them (in response to his ultimatum) when he's seen her use them before? That's why I was confused and wondering if she stole them from Nocturna. Because that would make about a much sense as everything else.