Just a point here: WotC isn't working on a 6e. It's working in a 5.5e. Everything will be compatible to 5e material exactly in the same way 3.5 material were compatible with 3.0 material. Nothing new on this front. They said that this edition (5.5e is unofficial and oned&d has been scrapped) will be their last and will live in perpetuity but this is just laughable. By 2030 I bet there will be a 6th edition.
I think that's a farce though...some of the changes they want to bring are too drastically different. This 5.5e will be unrecognizable from 5e.
