There could be an Al Lutz clone for WDW (no offense to Lutz who probably would contend he is a unique human being, blah blah blah). DLR has all of the same divisions as WDW, or nearly all, and whomever would be the Lutz-equivalent wouldn't have to know everything, he would just have to have a strong track record with his rumors. He could have maybe 3-6 inside connections and be fine. Maybe we wouldn't get all of the rumors about new dishes coming to Coronado Springs, or something like that, but as long as we got some of the big stuff, that would suffice.
At one point, I thought Jim Hill could be that equivalent. However, it seems he's really fallen off the radar. I can't remember the last time he had a substantial rumor.
Yee does a great job covering WDW, but I think it's fairly apparent that any inside information he has comes from here or is regurgitated from other sources.