The customer service page from Lego where you can download instructions, has listed some new polybags that are coming out soon.
30351 Police Helicopter
This polybag is already available (since March 1) with any merchandise purchase over $35 usd.
30449 The Milano
This polybag is only expected for May, just a little after the movie is released. There has been the occasional blurry image leaked but no clear one. This is probably the best one to find at the moment. The instructions are below, but the pieces are quite hard to find and won’t meet with the requirements of all fan builders.
You can check out all the new polybags currently listed. There are also some Ninjago, Nexo Knights and Friends polybags available.