In the animated world, these three form DC's prime antihero trio

Poison Ivy?

Yes, we know it's a stretch but Scarlett has cut ties with Marvel, she could be ready to get some DC love/action?

Poison Ivy?

Could she be DC's  Red headed, A*se kicking friend of the Earth?  Why not!

Harley Quinn

Harley is one of the most popular DC movie characters, but maybe she needs to vanish for a bit to avoid over exposure?

Harley Quinn

Then imagine she came back in about two years as part of this treacherous trio!

Catwoman

Zoe Kravitz is yet to make her debut in The Batman as Catwoman, having previously played Angel in X-men first class and Mary Jane in Spiderman into the Spiderverse

Catwoman

She has signed on for  'The Batman' trilogy,  if that goes well, she'll be in  the DC-Verse for a while,  available for 'other' projects