Hydro man I would love to see has I think out side of carnige and hobgoblin he is the best villain to not be in a movie yet but he is kind of to similary to sandman so I don't know if they would use him or not.
do you honestly think Hydro-Man would fit into the cinematic universe that Sony are trying to build?
After how Sandman was treated i have no confidence what-so-ever that Hydro man will make any appearance in Spidey Films and nor should he imo