A gamer has been digging around The Elder Scrolls V: Skyrim’s Patch 1.5.26 update files.Which would supposely contains the folder “DLC01″ with the following content below

 BethSoft forum user scanned the files from patch (1.5.26) and found some very interesting file names.

Animations\[b]DLC01\Chair_SnowElfPrinceDialogueA.HKX[/b]
Animations\[b]DLC01\Chair_SnowElfPrinceDialogueB.HKX[/b]
Animations\[b]DLC01\Chair_SnowElfPrinceDialogueC.HKX[/b]
Animations\[b]DLC01\Chair_SnowElfPrinceDialogueD.HKX[/b]
Animations\[b]DLC01[/b]\Chair_SnowElfPrinceDialogueE.HKX
Animations\[b]DLC01[/b]\Chair_SnowElfPrinceFireBall.HKX
Animations\[b]DLC01[/b]\Chair_SnowElfPrinceSitIdle.HKX
Animations[b]\DLC01\SnowElfPrinceAscensionBurning.HKX[/b]

crossbow_direction_behavior.hkx
Animations\CrossBow_1stP_Run.hkx
Animations\CrossBow_1stP_Walk.hkx
Animations\CrossBow_Aim.hkx
Animations\CrossBow_Equip.hkx
Animations\CrossBow_IdleDrawn.hkx
Animations\CrossBow_IdleHeld.hkx
Animations\CrossBow_Release.hkx

Snow Elves and crossbows.  Even the Snow Elf Prince. including on that patch

• Snow elves
• Snow Elf Prince
• Crossbows
• New vampire feeding animations
• Something prefixed ‘RF’.

However,  we cant verified whether this is true or not but we’ll be the first to informed you if we hear anything

Source