i kinda doubt any of the so-called NWOTHM bands grouped together and decided to create a new movement with some unified goal in mind. that kinda happened for trad doom with rev bizarre and friends, and second wave black metal in norway etc, but this just seems like a case of trad metal becoming more popular due to certain high profile bands doing well, certain publications praising them etc - these things become a bandwagon quite easily, especially with the easy access of the internet and the increased appeal of nostalgia lately. different bands that you're grouping in that movement are probably trying to accomplish different things. i imagine the majority of them are just trying to make music that they themselves would enjoy listening to, and trying to recapture the magic of the '80s that's been lost over the years. i don't get the impression they're trying to innovate anything.