Whether this is legitimate or no, we may not know until there's an official announcement. However, this image has made its way out onto the net, displaying all three rogue trees and the tooltips for new talents. The talents don't look terribly unreasonable, and they contain some interesting things (and by "interesting" I mean "things I've never seen players discuss or ask for") that we've seen in other rumors - specifically the talent that increases the effect of healing on the player. But you'll have to decide for yourself if you think these are for real. A list of talents shown in the screenshot continues below.
Fleet Footed: Increases your chance to resist movement impairing effects by 5/10% and increases your movement speed by 4/8%. This does not stack with other movement speed increasing effects.
Quick Recovery: All healing effects on you are increased by 10/20%. In addition, your finishing moves cost 40/80% less Energy when they fail to hit.
Master Poisoner: Reduces the chance your poisons will be resisted by 2/4% and increases your chance to resist Poison effects by an additional 15/30%.
Deadened Nerves: Decreases all physical damage taken by 1/2/3/4/5%.
Find Weakness: Your finishing moves increase the damage of all offensive abilities by 2/4/6/8/10% for 10 sec.
Surprise Attack: Requires 1 point in Vigor. A strike that deals 100% weapon damage. This attack cannot be blocked, dodged, or parried. Awards 1 combo point. 30 energy, 5yd range, instant, 15 sec cooldown, requires melee weapon.
Vitality: Increases your total Stamina by 3/6%.
Nerves of Steel: Increases your chance to resist Stun and Fear effects by an additional 5/10%.
Blade Twisting: Gives your Sinister Strike, Backstab, Gouge and Shiv abilities a 5/10/15/20/25% chance to Daze the target for 8 sec.
Shadow Strikes: Requires 1 point in Adrenaline Rush. All melee attacks against Poisoned or Dazed targets cause additional Shadow damage equal to 10% of weapon damage.
Enveloping Shadows: Increases your chance to avoid area of effect attacks by an additional 5/10/15%.
Cheat Death: You have a 4/8/12/16/20% chance to completely avoid any damaging attack that would otherwise kill you.
Sinister Calling: Requires 1 point in Premeditation. Increases your Agility by 2/4/6/8/10%.
Cloak of Shadows: When activated, you become immune to all spells for 4 sec. This will not remove existing effects, though you will be immune to the effects while Cloak of Shadows is active. Instant, 10 sec cooldown.