I'm a fan even if it went over the top with it's message but is it really that bad if the message is a good one? In fact I think after the early 90s people stopped giving a crap about the environment because we never had any shows to educate newer generations and most forgot but things didn't get magically better and it's the reason we're in this problem now which by the way people still deny there is one.
As far as the show we do need a new one but without someone as passionate as Ted Turner I find it hard but at least we'll be getting this new movie that could get a new show into production especially if celebrities like Leonardo DiCaprio want to use their influence for the greater good like he is with this movie.
The new movie's concept is cool as it's a continuation of the show and people ignoring the problems. That was always my concept for a new show so I guess great minds think alike
And we're getting into fanfiction territory but I always pictured the new team including the son or daughter of Wheeler/Linka for continuity purposes and characters from countries with big pollution problems, sadly many of them would be from the same countries as the original (Mati and Gi are implied to be Brazilian/Chinese) but maybe keeping it a bit ambiguous like the originals how even if they did imply it in a few episodes.