On todays episode of Five Nights At Freddy's 2 we talk about how chica 2.0 is possibly building Foxy 2.0!
Forum Post - steamcommunity.com/workshop/filedetails/discussion/329921390/613940478005627977/
Theory 2:Chica is the puppeteer or assembling the fox.
In the teaser image we can see chica holding an animatronic head, in the images bottom corner we can see the ear of the terrifyingly awesome spider foxy. Many claim this is the "marionette" in the poster. it could very well be true, considering the body of the figure is a dark black, and we have a dark black but thin suit like costume for the spider fox. Now heres where it gets a bit confusing, ill try to explain the idea has best has possible.
The figure chica is holding seems to be the fox, i think that its very possible that the head itself is only supported by a bar of some sort it seems like its attached to some wiring in the second photo of the fox. in the trailer it looks like its in a heap, as if it had no way of actually moving its own limbs or something.
Now this is where it might get really confusing
I think chica, is going to the parts room, and getting some sort of wiring or parts to make the fox work. she may also be reassembling it too, because its body parts seem to be all misplaced.
Chica could also be puppeteering, considering shes holding the damn robot in the image.but i think its unlikely.