A tweet from a tipster with the handle @OnLeaks says that the LG G4 is going to feature a 5.6-inch screen. That would represent a slim .1 inch increase from the size of the screen on the LG G3. We expect the resolution to remain at 1440 x 2560. We don't expect to see the LG G4 introduced until May. The current flagship model was unveiled on May 27th, 2014.
The LG G4 will feature a 64-bit octa-core Snapdragon 810 under the hood. We could see a 16MP-20MP rear camera on the handset with OIS still included. Most likely LG will stick with 3GB of RAM and 32GB of native storage.
This year, LG will apparently have something even bigger up its sleeves with the LG G4 Note. Early speculation has the device earmarked for the second half of the year, carrying a 5.8-inch display. This model is apparently being considered as a challenger to the Samsung Galaxy Note 4, and will be offered with a stylus that might be called the G Pen.