I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
See, even the Justice League is under Ivy's spell - and they'll do anything they have to in order for her to create the peaceful world she's always wanted, the one in which plants continue to thrive.
What's Batman going to do? How can he go up against the might of all the Justice League without harming them, or getting himself killed?