Current status
Shadow has been named as a class associated with the Early Access content plan. That confirms the class name, but does not by itself prove a particular weapon, spell school, stealth mechanic, or finished kit.
How to verify it on launch
Check the live character-selection screen, current patch notes, and in-game descriptions. Record the displayed skills and attributes before making claims about a preferred race pairing or party role.
Keep unknowns separate
Do not relabel Shadow as an assassin or rogue unless the current game does so. A useful guide distinguishes the announced class from speculation about rotations, rankings, and gear.