My prediction: Price will surpass the previous ATH in 2016.
Imho the halving is a significant event that will lead to price increases for sure. However it is very difficult to predict the magnitude. Volatility will continue to be extreme.
There are two factors affecting the price this year.
The block size increase to 2MB or higher.
The block reward reduces from 25 to 12.5.
I believe there is no problem with block size and it might has very less influential impact in deciding bitcoin prices. Only block halving will decide the future price of bitcoin. I predict, halving will launch bitcoin prices to massive $10,000 levels also.