Vincent and the Doctor
Idea Not Proposed but Used Anyway During the JNT Era: A monster that looks unfortunately like a giant chicken (seriously, "Arc of Infinity" may be terrible, but I very much doubt the script description of the Ergon read "looks unfortunately like a giant chicken").
Central Premise Recycled From: Mostly "The Shakespeare Code," though there's an element of "Tooth and Claw" in Amy trying to get van Gogh to paint some sunflowers.
Reference to Moffat's Back Catalogue: "The Girl in the Fireplace" again: the Doctor bonds with a historical figure but not enough to stop them dying tragically before retirement age.
Gratuitous Scottish Joke: Van Gogh has a Scottish accent. Amy has a Scottish accent. "Are you also from Holland?" van Gogh asks Amy. Cue rimshot.
Amy Saves the Day with Wuv: Amy Wuvs Vincent, and makes his final days a little happier by doing so. Aw.
Tennant Line: "No, no no no no!"
Star Wars Bit: Hero with A Destiny, which is recognised by a mysterious traveler and/or hermit, but by no one else.
Nostalgia UK: Who didn't have a copy of either "Starry Night" or "Sunflowers" on the wall of their first residence room/bedsit/flatshare?
Teeth!: No, but some Beak! on the invisible chicken monster.
Item Most Likely to Wind Up as a Toy: The invisible chicken monster obviously, though are Character Options bold enough to just release an empty package and claim it's the monster? It'd be one up on "Destroyed Cassandra," certainly.
Something Gets Redesigned: Two van Gogh paintings.
The Crack in the Universe Is: Running through van Gogh's mind. No, really, since he clearly detects the absence of Rory.