I like some of your points bob, but I have to disagree largely on two that a lot of people are also harping on.
1. Harry Potter reboot - you mention a trilogy. Making the movies only hit the talking points would reduce each of the movies down to about an hour or less - and reducing the mythos would cut out a big part of the Harry Potter series. What makes the Harry Potter movies exceptional is that they convey and charactarize the characters with more than just action - the action points of the series being the weakest, with the exception of the final parts. Harry's skill never evolves much past "Expelliarmus" and "Stupify", making his fight scenes feel weak and soggy.
I think remakes are warranted - but I think thats mostly because 1, 2, 4, 5, and 7 Part 1 were both too long, and didn't convey enough. They felt like narrative dumps - spark notes, without the real feeling. 3 had an amazing art direction, 6 was a movie that showed that you didn't have to make Harry Potter about action to capitalize on the franchise, and 7 Part 2 was the big, expensive finale with lots of explosions. If Harry Potter WAS remade, I would have just expanded on the concepts of revealed at the midpoint of the 6th and 7th book, and expanded them. The book even felt rushed. "7 key objects we have to kill, some are already destroyed. We just happened to trip over the remaining few in the final acts." It stinks of lazy design, and I wouldn't mind a different variation on the canon to make it flow better.
2. The Simpsons. Look at the reboot of Ren and Stimpy. Enough said on that issue. The Simpsons, as a cultural icon, deserves a proper death and burial - not a rehash or reimagining. It worked best as a contemporary view of Americana during the 90's and millenium. A twisted look at family values. And even the Simpsons seems to have gotten off track. There are things that I think would work fine as just finished - not dug up and repurposed. The Simpsons is one of them. Family Guy was another series that probably should have stayed dead, but thats a different discussion