https://www.change.org/p/release-dragon-ball-fighterz-for-nintendo-switch
the developers have said in an interview that it is not hardware constrained, they just need to see that people want it on switch.
http://gonintendo.com/stories/283216-dragon-ball-fighterz-switch-port-could-happen-if-fans-request-it
Spread the word!
(sorry if there is a post with the petition but i couldn't find one)