You get all dlc content that comes out in the future but you get execution and haven the new map right now.

Then you also have 2x XP forever now in the VIP playlist so buying more 2x XP gives you 4x XP.

And you get severak new skins for your gun like this cool burning one, a bronze one, a skin with the radioactive skin and you also get two new characters which are the onyx male and female guard. As well as that you get several character skins called big game, arctic which looks really good an evil clown one and a plaid uniform.

That is it I believe the 2x XP forever is worth it already

I just bought it,
Firstly you will obviously get to play on the VIP playlist which on each game mode you get double xp,
You receive the map 'haven' can't describe it as I haven't yet played it (sorry!)
Character skins:
'BIG GAME' a lepoard like camoflague
'ARCTIC ARMOR' title says it really - black and white
'DARK CARNIVAL' the actual skin of the character turns pale white and the armour itself is a beige/grey colour
'PLAID' half of the armour is blue with red, orange and white stripes inside
Weapon Skins:
'ZEBRA' obviously a zebra camoflague
'HOTROD' multicoloured flames
'HAZARDOUS' black and yellow diagonal stripes with a nuke symbol
'ARES BRONZE' a mix between green and bronze
'FLAMES OF JUDGEMENT' red and orange flames which move on your gun
There is also a new game mode 'execution' one life per player every round and the score limit is 5 rounds
You will also receive future dlc, hope I helped!

Thanks guys. Really helped out a lot. Once I get the game Hopfully we all can play.