I would really love that when a big company is doing something positive environmentally, we don't automatically Pavlovly assume it is greenwashing. There are some instances of greenwashing (doing some minor token effort to hide bigger destructive behavior in the back) but there are also some changes that we need from them and that would be extremely counter-productive to dismiss.
Just saying "this is greenwashing because it is a big company" without explaining why it is is just lazy.
Disney produces wolrdviews, propaganda if you will. That their worldview promote a positive future through environmental policies is a big thing. It could have as easily made a fiction where the bad guys are misguided ecoterrorists and where capitalist conservatives saves the day.
I have absolutely no love for Disney as a company and would be glad to see it gone, but if I have to choose between them promoting business as usual and them promoting change-based solarpunk, I'll get the latter.
I am open to change my opinion in front of an argumented contradiction, but until them I don't see in what respect this should be called greenwashing.
Disney could also be using solarpunk as a marketing tool which I would also class as greenwashing and Disney just feels sketchy as a company in general
It could also care genuinely about the environment. We need arguments to weight one way or the others. Big companies are not one monolithic ideological bloc. I can imagine the creatives and writers at Disney genuinely caring about promoting utopias instead of dystopias.