Dive into your creative stream
I don't know why, but Penguine!Shifter Danny has been stuck in my head for a while now.
Especially with that clip of the giant baby penguin going around. I just imagine larger than average baby penguin Danny hanging out with this colony of penguins somewhere, having the time of his (after)life. Especially if he's up in Antarctica, where he gets to enjoy the stars AND the Aurora Boriallis. For extra laughs, the penguins he's hanging around aren't even the same species as him, and are smaller in size. So more often then not, Danny finds his baby penguin ass stuck in the middle of a giant cuddle pile.
Cue researchers seeing this way-above averaged sized baby penguin living with the wrong colony. Obviously they would try and return him to the right colony, seeing as he definitely would have problems getting fed properly by whatever penguin is taking care of him. Only, when they try to remove this oversized baby with unnaturally bright green eyes, all he colony gets offended and chases them off.
Eventually this spreads to the news and a certain animal-loving Robin is doing his best to convince his father that this could be a case for him and Superboy. It's low-stakes, has no dangerous rogues, and he's helping people with something rhat is a non-emergency. It would be good for PR or whatever, making him seem less scary to the masses for weilding a sword. He sees that thoughtful smirk Bruce, he already knows he's won. Yes, yes, he'll take one of his brothers as supervision, he's not a child! He knows how out-of-Gotham missions work!
On the other hand, the GIW are looking for escaped specimen Phantom and having very little luck. Until they randomly come across a scientific article about a very unusual penguin. One with very familiar green eyes.... I mean, it might not be Phantom, but it's definitely the type of stunt a ghost would pull. They should probably investigate.