doubleofive said:

I didn't imagine they would go too far back. Moffat seems to hate even referencing past seasons, let alone past Doctors, & most of the references to the Classic Who seem to be tongue-in-cheek.

what about the episodes with Sarah Jane and the one with Jo Grant? those seem like more than just tongue-in-cheek references.

doubleofive said:

Having all of these old guys show up would only serve to confuse this "next generation." It would probably confuse me, and I don't mind reading wikis to figure out what people are talking about.

If those old guys would confuse you, you are not a real Whovian. Also keep in mind, this isn't an anniversary of the new series, this is the 50th anniversary of the beginning of the original series.