Watch Batman and Harley Quinn (2017) HD Full Movie Free on SolarMovie. Watch Batman and Harley Quinn (2017) online free. Batman and Nightwing are forced to team with the Joker's sometimes-girlfriend Harley Quinn to stop a...Batman and Nightwing are forced to team with the Joker's sometimes-girlfriend Harley Quinn to stop a global threat brought about by Poison Ivy and Jason Woodrue, the Floronic Man.