I don't think it needs a special episode or any references in the series itself, but I would like it if they made a special of good old Doctor Who Confidential. Have a nice long special all about the efforts/hurdles in bringing the show back and what impact its had over the years since its return. Interviews with the likes of RTD, Moffat, Eccelston, Tennant, Smith and Capaldi would be nice, especially if they were all sat around talking to each other about their experiences and how its impacted them.
That sort of thing would do me nicely. No special episodes, though. Just give me a full 13-episode series with no mid-series breaks in 2015 and I'll be a happy man!