I still have my Gear VR from Note 4 and Note 5 is not supported.
My biggest concern is storage. My 32GB SD was half way full using Gear VR with content, videos and games. Where will we store all the VR data now that we don't have SD card?
I've purchased a 1tb wireless hard drive. I've loaded some movies on it and watched them om my note 5 via wifi. It worked very well. Should be able to test on my new Gear VR next week.