I don’t understand why the Doctor couldn’t just go back a year after what Amy and Rory were sent back to and pick them up. The fixed point was their deaths, they could still have adventures and be brought back to live life to their deaths.
Too much harping on the past if needless often shows a lack of solid new stories. This is how things become hopelessly fannish and repellent to new viewers/readers. If I who has watched everything available at least once, and have piles of DVDs and magazines, am not interested in recalling past supposed 'glories'.... and I'm very much not now when the show continuing much longer is looking precarious. Back when this show was most alive with multiple millions of viewers you have to realize that Draconians and Zygons only appeared once, and that past incarnations and companions were for anniversary specials (let's not talk about the horrid 'Two Doctors' as any kind of exception). Somewhere it got to be about guest stars and exhuming past stories/glories and characters and it was cancelled numerous times until a BBC and CBC co-production with Eccleston got it on it's feet again with one solid season.
Now back to retreads of old glories, guest-stars (even if a writer), and sheer topical or gimmick hooks to boost interest and attention? There is no substitute for a solid story with believable and interesting characters with relatable motivations. I never saw what was special about Amy Pond over any other companion, nor Sarah Jane. The fans like to catch up with them but making their story the focus too much is not Doctor Who. Gaiman is usually an excellent writer though so always open to being shown worrying for nothing! :^)