I thought we where suppose to have a considerate amount of cap space in 2016
Nope.
The following add considerably to the 2016 cap number that Miguel has posted.
1) Only 32 players are included. Even minimum cost players add $16M.
2) If signed to a long-term deal, McCourty and Revis would likely add $23M.
3) If signed to a long-term deal, Solder would add another $8M.
4) Hightower will be in his 5th year contract, an increase of about $5M.
5) Jones will be in his 5th year contract, an increase of about $5M.
6) This year's rookies will add about 3M.
TOTAL - $60M in additional to what's there now
IN ADDITION
7) To the degree that player are restructured, keeping their compensation the same, cap money would be reduced in 2015, but would INCREASE the cap charges in 2016. These restructures might include any of the following: Brady, Gronkowski, Arrington, and Browner.
These will reduce the 2016 number
8) Wilfork will likely count for $0.
9) Amendola's number will be greatly reduced (or the amount for his replacement)
10) Mayo's number might be less, must some money from 2015 is likely to be moved into 2016.