Is the infinite dimensional space of symplectic compact sub-varieties of a symplectic variety, symplectic?
The symplectic form $\Omega$ at $M$ would be:
$$\Omega (X,Y)= \int_M \omega (X_x, Y_x) dx $$
where $\omega$ is the symplectic form of the variety, and $X,Y$ are vectors at $M$.