In terms of characters being rehashed. Sometimes it makes sense, and I feel that it works. Sometimes it doesn't. I like that in the Comics for instance that Spider-man is out of goddman School. I'll accept the hate but due to the fact I only buy volumes for anything not Star Wars (Money saving, I only got into comics a couple of years ago and a local comic book store isn't a thing where I am) the only Spider-man stuff I have read is Slotts work xD
I don't know though, there's breathing new life into things then rehashing. I.E. Changing who the Hulk is in ANAD. I don't even want to know how that happened, and I hope nobody ever tells me. Hulk is one of those characters (to me) who is who he is, and I feel should be inseperable from Banner. It's not a mantle like Thor or Captain America that can be passed around. It's more or less an affliction, rather than giving him legacies or passing it on I'd like to see Banner age or see alternate stories similar to Indestructible Hulk or Doc Green (I think they coulda got more out of Doc Green tbh).
They also maybe need to be a little more original with their new characters as well, again I'm speaking largely from a Marvel point of view as all I have read from DC is The Flash. Take Silk for example, she's new! But she's a Spider-man rehash.