Thanks again for reading and reviewing! Wanted to add it in the last response, but couldn't edit it - but yes, I definitely wanted Harley to behave in that manner for the story. There are aware giantesses, and there are unaware giantesses. I wanted Harley somewhere in between, which to me meant a neglectful giantess - but in a playful way! I'm glad you enjoyed the ending to it, as well. I was worried it might get some hate from readers because Harley starts one way, then goes to another, and then another. However, to me, that's Harley. Keeps you guessing, but she has a method to her madness. She's not stupid, but she's alright with you thinking she is, as it disarms you. 

The Batgirl idea sounds great, but it's also something I did in the "Giantess Raven GF" story. Except, instead of Batgirl, it's Raven (of course). She finds a shrunken guy, tries to reverse the effects, continuously failing. They grow closer, and he basically becomes a familiar to her, and then something more. When I end up including heroes in this specific storyline, and I do want to include them, they would almost assuredly be gentle or unaware. There may be exceptions, like Huntress as you said, but by and large (heh) they'll either be gentle or unaware. Lois Lane would be interesting, and Talia would definitely get up to some interesting hijinks.

At the moment I know what I want the Gotham City Sirens to end up doing, but I don't know where I want the story to go beyond that initial setting change.

Killer Frost I definitely want in because, well, Popsicle tinies. Livewire I'm not sure what to do with her power in relation to tinies, but I definitely want someone with her personality in my works. Copperhead I want in because she's a hottie with a body and a snake theme. That's just a free in for vore right there, lol.

I think I could cook up some fun scenarios involving Harey/Ivy tricking Batgirl into sitting on and/or eating a tiny. Like put one in a dissolving capsule, force her to swallow without knowing what it was, then all of a sudden she feels a tickle in her stomach. Haven't put much thought into, but that's the first thing that comes to mind. Your idea of having her unknowingly sit on a tiny while tied to a chair would be really good, too. I especially like the idea of Batgirl having to care for a tiny, but recognizing him as someone from school. She would then have to operate under the assumption that he could one day be regrown, and if so then she has to protect her identity from him - while still having him under her care. A neat dynamic.

I don't want to throw any heroes at it too soon, though. Only because the more heroes are aware of the situation, the sooner they would be able to shut it down.

Right now, the plan going forward is to not focus on the DC-Licious stuff, but instead focus on Overwatch as well as an OC series I'm working. I've scripted some chapters and done some worldbuilding. Now I just need to think of a good look for the main character, an ice giantess, and I'll be set to start!

Without giving too much away, I can at least confirm that of the 3 gotham stories I've done so far, this will have the most butt stuff (and butt stuffing).

I'm glad Harley's nature is being read as, well, hard to read. That's of course how she should be. Unpredictable and wild. 

Thanks for reading, reviewing, and rating!