Re: Series 7b open questions - Spoillers
Funny if it were Donna, but my money is on River. Though, the Doctor did tell Jenny and Vastra to wait for him, so it could be another future Doctor setting things up for the past Doctor and getting Vastra or Jenny. River seems more likely. Though Susan or Victoria are distant possibilities for me. That would be a nice touch for the anniversary.
We are quicksilver, a fleeting shadow, a distant sound... our home has no boundaries beyond which we cannot pass. We live in music, in a flash of color... we live on the wind and in the sparkle of a star! Endora, Bewitched