If the mix of game mechanics work well together, then possibly.
For example, Prince of Persia mixed 3D movement with the ability to reverse time (like what Braid did a few years later), and those two game mechanics worked really well together. However, I can’t see that mix working in something like SSX Tricky or GTA. In those a restart is more appropriate.
In that case it’d be better to PM me, otherwise all and sundry will see it.
Keep in mind though that most other devs are too busy with their own ideas to worry much about yours. And a lot of devs feel like you do, that their idea will get stolen. But I have never heard of it happening to amateur game devs like most of us.