The first upcoming handset is the Lenovo K50. It sports a 5.5-inch display with 1080 x 1920 pixels, and is powered by an octa-core 1.7 GHz processor - most probably a MediaTek one. Other features include a 13 MP rear camera, 5 MP front-facing camera, 2 GB of RAM, 16 GB of internal memory, and microSD card support. The K50 weighs 150 grams, and measures 152.6 x 76 x 7.99 mm.
The second new Lenovo smartphone is called A7600, and is almost the same size as the K50: 152.4 x 76 x 8.39 mm. It's got a 5.5-inch display, too, but this one has a 720 x 1280 pixel resolution. The A7600 further offers an octa-core 1.5 GHz processor (once again, likely a MediaTek-made one), 13 MP and 5 MP cameras, 2 GB of RAM, and 8 GB of expandable internal memory.
Another Lenovo handset that should be announced soon is the Vibe Z3 Pro. Reportedly, this sports a 5.5-inch Quad HD display, and we might see it at MWC 2015 in early March. In fact, the K50 and A7600 could also be announced then. Hopefully, the Vibe Z3 Pro will also run Android Lollipop out of the box.
source: TENAA (1), (2)