No, mainly because no such movie ever existed. There was never a Supergirl movie in production or planning stages before or after 2010, although there was an animated direct to dvd film Superman/Batman: Apocalypse that released in 2010, where Supergirl… Full Answer
The X-Men is actually a large group of people. There are those that are weak, and those that are quite strong. Between Batman and Supergirl, Supergirl is stronger. Batman is just a regular guy with no powers.