if you focus on late 2017 or early-mid 2018 for the price to reach $1000 again, then the chances for this to happen become much higher. 2016 is way too early and whe don't even know whether or not the price will touch $600 this year.
yes i think too fast for 2016 could reach $1000, although this year there will be halving. 2017-2018 possibility we could see back to $1000.
Yes that price is achievable by the end of the year as price is moving up now and it will continue to go up until the halving occurs so we can see that price by the end of the year.
$1000 is a realistic price but this year's achieving completely depends on the price after halving. So we can just hope for the best.