The probability of investing in stocks in 2016 hoping for a 20%, 50% or 100% return in the next 2-12 years is close to zero. If you wanted to invest in stocks you should have done it when there was "free money" available. ZIRP.
I think the possibility of a correction down to 1,500 in the S&P in 2016 is high but a few technical levels need to break. The fact we haven't seen a new high in the S&P is a signal. Lower highs, lower lows. The longer term lower low is the Black Monday low sub 1,830. If that goes, Game Over for a while.