It already takes hours of effort to write and publish a mod that does literally nothing. So if your mod idea can really be implemented in such a short time, there is no need to be secretive about it and you can just post your idea here.
If have no effect, why you write it?
I have more than one idea. Mod that change inventory into infinite amount of cells (for using with mods that adds weight). Mod that absolutely remove XP and add skill system with training by actual ingame actions (that system also will be used for further mods). Mod that adds new equipping system, with four layers of armor and slots for jewelry. Modular mod LA SAIGI, with modules called as one of seven sins. Mod with some special magic, where you train your powers in one of seven magic spheres by doing non-magical actions, but related with this spheres. Mod that adds cogs and more redstone functions to them. Simple mod of some industry that not change worldgen at all (golden wires, uranium from redstone). Simple mod that adds coins for trading. Simple remodelling mod, that make horse model simpler and rework shields. Joke mod that add roaches (retextured silverfish). Port of old TobaccoCraft from 1.2.5 version.
But I prefer older versions of game. No newer than 1.7.10, but I think 1.5.2 is better.
Minecraft modders, please, send me PM! I have some ideas, but cannot write Java.
Yes you can. If your idea is good, pay someone to make it or make it yourself. Noone is going to dedicate months or years of their own life for free for your idea.
Month? Some hours it will need.
If it just takes a few hours, go do it yourself. Or post your idea and maybe someone else will.
I cannot mod in java. For making mod by myself, I need better moddable files (like DF RAWs or C&C ini) or program that will compile mods for me.