What are the chances of a completely new defense that turns out not to be an old defense? Not just in chess but also in most things hundreds of years old. Truly novel ideas are extremely rare. So if you have something really new then share it, the world will be better for it.
Possible Moral Dilemma

Best bet is to spend the next 9 years reaching the top echelons of chess, qualify to challenge for the WCC title, and then uncork your novelty in that match. Whoever happens to be champion at that time will be helpless!!
Or, if you don't think you will ever make it that far, you could always sell your idea to somebody who will.

Your post makes no sense. The enjoyment of chess isn't restricted to one opening... certainly not for individuals above 2000.
"Destroy" the work of others? You're not destroying it at all, the truth is. The truth of a chess position isn't a matter of opinion, it's not a product of your work, it's only discovered through your work.
You're making this a personal issue (between yourself, authors, and players) when that doesn't seem to be the case at all.

An opening novelty is like a passed pawn. The only thing you are obligated to do is figure out how to milk it for all it is worth.

The question was theoretical as I am working on a line which so far looks good but I have many days of analysis to nail it down.
I would never say I have something that is very good unless I have nailed it down with many many variations and a ton of analysis. So, I need quite a bit more time to analyze.
actually in an other opening I do have a line which is very good but this line helps an opening rather than refutes but this new line has never been in data bases etc and it undos a refutation of the opening and I am
70% finished analyzing and putting down the hundreds of variations.

I cannot demonstrate a line as the move is very early in the opening and would give it all away before I have finished with the analysis.

honestly i have had moves and opening theory named after me and attributed to me but it is beside the point.
If a strong player wants to play email against me ok but my theory is only 15% developed so am not claiming anything though I do have a 70% variation which will help I am willing to try via email but has to be secret so message me if you are expert or above and interested.

It is only a moral dilemma for me as I really dislike hurting others even in the name of "progress" as it is only a chess opening. So I understand the arguments for progress as I am a progressive myself.
I am contacting an expert to try the line but it is way far from being complete.
Try contacting a GM who prefers that opening, or a Postal GM would likely be even better at developing Theory.

If, when, I develop the theory from 15% to 80% and it still holds up I will.
I do have a great ponziani line which has not seen the light of day and am waiting til someone plays into it via vote chess.

Darwin sat on his theory of evolution for about 30 years (from memory). He realised that if he was right his theory went against what was written in the Bible and that was likely to upset a lot of people (including his own wife) and would also unleash a lot of powerful forces against him. He wanted to be absolutely sure he was right before he published. He might never have published if Wallace hadn't written to him to say he was onto something very similar and was preparing to publish. (Many Scots still credit Wallace with having got there first and regard Darwin as a plagiarist). My advice (as a human being not as a chess expert):- Complete your work till you're reasonably sure then publish it immediately and wait to see what other people make of it. If you are right you will deservedly be congratulated. If you are wrong you will at least have contributed some original research and as long as you are not too arrogant in your assertions nobody will hold it against you. Chess is competitive but theorising about chess (or anything else) should not be. Put aside your competitive instincts and think instead about adding to the sum of human knowledge. Good luck.
I know the Ponziani line you are talking about. I am considering playing the black side of it in the tournament. I just do not fully understand the analysis. And i know no one in the tournament knows the white side!

For professionals, the whole point is finding the best moves. So if that happened to a good player he would use the line in an important game and it is out. Surprises and improvements like these are found all the time. Some innovative GM's hate it their novelty is out after just one game, so it can be scrutinized and countered.
I'm no different myself. If I find a nice idea myself I will play it the next game, assuming I can appreciate it. No guarantee that will attract an audience though.
There's no such thing as one line that refutes an entire opening. People have been kicking against the Dragon and the King's Indian too. I actually have no line in my opening book that refutes those openings. What happened to those lines?
Does ponz mean using it in a game without telling anyone? That's totally fine. Everyone is responsible for their good moves, whether it's them coming up with their own or deciding to trust the opinions of other sources.