bat man located the joker at his hideout, prepared to take him down and ready for any trick the clown has up his sleeve, he enters into a trap, his wrists and legs tied up, joker comes out of the shadows with a lil green elixir in his hand, he doesn’t say what it does, all he says that Batman will be feeling a lil, softer, unable to break free in time joker pours the entire elixir down his throat, right as he does Bruce manages to escape and fight off jokers goons, tho in the process joker escaped and Batman returns to the batcave worried he was given poison, tho when he checks his vitals everything is fine, any poisons, nothing, he figured maybe joker just did that to trick him..but unknown to him, this was just the beginning, as the weeks went on, Batman/bruce has noticed changes to his body, his abs have started to look less defined no matter how hard he worked out, he’s still strong but his body is looking a lil softer, and his hunger has spiked drastically, eating more junky foods in the process, as more time passes, it no longer looks stable, Bruce has gotten FAT his belly has gotten big, his muscles are now covered in soft fat, his pecks are now soft man boobs, his body wide, and his thighs and ass are fat as well, he’s had to replace all his suits with replacements that fit his expanding body, he’s no longer taken seriously by his villains and struggles to even fit in the Batmobile, so one die while eating multiple bags of big belly burger at the bat computer, he starts checking his body system

struggling to keep his hands on the keyboard

“This is getting harder day by day..stupid belly keeps squishing on here.. eats a burger, his utility belt finally snapping ugh..of course,.”