This is really... intriguing, to say the least.
I've watched the newly recorded interviews and the cozy conversation they taped between David Lynch, Kyle Maclachlan and Madchen Amick for the blu-ray release. It surely gave the impression that whatever bad blood that may have existed between David and Kyle after Twin Peaks wrapped up back in the 90s, is long gone. They obviously had fun refreshing all the fond memories of making Twin Peaks.
I'd suspect they could investigate what happened to Cooper in the Black Lodge and funnily enough - the original series depicted him still trapped there when he was about the same age as Kyle is now.