If I play a Hidden card the same turn I play Time Warp, can I cast the Hidden card during my next turn (the extra turn from Time Warp)?

Ruling: Yes, you can cast the Hidden card during your extra turn from Time Warp. The extra turn counts as a new turn, which satisfies the Hidden timing requirement.

Nuances:

• Even though you are the same player taking the extra turn, it still qualifies as a "new turn" for Hidden card timing purposes