And other my latch idea is Corner Latch Cube where arrows are on corners,
or even more - combination of regular Latch Cube with Corner case: arrows
are on corners and edges.

Will somebody create it?

I guess it could be made. On the latch cube the edges can turn only one way because of a ratch kind of mechanism that is also in the center pieces. So on your design the corners need spikes/teeth that anchor in the edgepieces below.
I can't take my latch cube apart and couldn't find any pictures of the internals really quick. So I don't know how exactly the centerpieces on a latch cube are shaped. I don't really get how the blocking of two different directions on the normal latch cube is possible anyway. Same center piece; different edgepieces (black or white arrow); different blockings.
But it should work with corners too.

many mecanism photo there : http://speedcubing.su/index.php?topic=5 ... 28#msg6728

imho: corner cobe or edge cube

I had that same idea yesterday. On the subject of Latch Cube variations, is it possible to make center pieces not have holes/notches on a few sides to make the self bandaging more complicated? Solving it would be sort of like the nightmare cube.