You guessed it - it's an epic boss, starting at 3pm PST today.
Here is all the loot:
Rarity Name Type Atk Def Common Kane's Muscle Car car 142 173 Common Gordon's Groovy Jacket armor 163 162 Common PI's Grenade explosive 190 155 Uncommon Kane's Extractor melee 290 436 Uncommon Gordon's Tec 9 gun 373 373 Uncommon Gordon's Viper car 460 306 Rare Kane's Duster armor 707 863 Rare Gordon's TNT explosive 806 805 Rare PI's Lethal Gloves melee 908 743 Super Rare Gordon's Desert Eagle gun 1303 1954 Super Rare PI's Cruiser car 1679 1679 Super Rare Kane's Pads armor 2074 1383 Epic Gordon's Martini Bomb explosive 3185 3892 Epic Kane's Ripper melee 3638 3638 Epic Gordon's PPK gun 4112 3365 Legendary Kane's Cruiser car 5742 8613 Legendary Hi Impact Bomb explosive 7377 7377 Legendary Diamond Knucks melee 9092 6061
Here are the individual goals/prizes:
Goal Name XP Reward Atk Def Bonus Defeat Gordon Kane 1 Time 5 Gordon's Windbreaker 163 199 Defeat Gordon Kane 3 Times 10 Kane's 9mm Pistols 272 271 Defeat Gordon Kane 6 Times 15 Gordon's Spectre 497 406 Defeat Gordon Kane 10 Times 20 Kane's Badass Coat 592 889 Defeat Gordon Kane 15 Times 25 Kane's Briefcase 1111 1111 Defeat Gordon Kane 21 Times 30 Gordon's Chains 1889 1260 Defeat Gordon Kane 28 Times 35 Gordon's A1 Pistol 1963 2399 Defeat Gordon Kane 36 Times 40 Kane's Street Beast 2846 2846 Defeat Gordon Kane 45 Times 45 Gordon's Gloves 3965 3244 Defeat Gordon Kane 50 Times 50 Kane's Explosives 3653 5479 Defeat Gordon Kane 55 Times 55 Gordon's Alley Basher 5538 5537 Defeat Gordon Kane 60 Times 60 Kane's Sniper Rifle 7927 5285 Defeat Gordon Kane 65 Times 65 Gordon's Stradale 7164 8755 Defeat Gordon Kane 70 Times 70 Kane's Street Armor 9252 9252 Defeat Gordon Kane 75 Times 75 Kane's Compact Pistol 11710 9580 Defeat Gordon Kane 80 Times 80 Kane's Street Demon 9710 14565 Defeat Gordon Kane 85 Times 85 Gordon's Bullet Proof Vest 13729 13728 Defeat Gordon Kane 90 Times 90 Kane's Door Busters 18504 12336 Defeat Gordon Kane 95 Times 95 Gordon's Roadster 18932 15489 Defeat Gordon Kane 100 Times 100 Kane's Sweet Defender 78013 63828 12% Gun Attack Ending Gordon Kane Kane's Cobra Cycle 149177 122054 20% Explosive Attack
and the syndicate goals/prizes, complete 1 a day:
Goal Name Description XP Reward ATK DEF Bonus Don't Get Kaned I Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack Don't Get Kaned II Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack Don't Get Kaned III Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack Don't Get Kaned IV Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack Don't Get Kaned V Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack Don't Get Kaned VI Have your Syndicate defeat him 300 times. 10 Gordon's Slicer 20751 20751 2% Melee Attack