here are some designs for trolls x tlm au! and some info below the cut
batman is a rock troll who turned grey after his parents death. he still plays rock music though only as batman and Bruce Wayne is famous for staying away from singing and any music.
(IMO there can be multiple reasons a troll turns grey and a grey troll can still sing but usually they just lack a desire to. batman's reason for being grey is not related to singing)
emmet and lucy are both pop trolls. but lucy tries her best to hide her pop ties and dyes her hair black. she is not grey but pretends she is and refuses to sing and listen to pop songs especially "everything is awesome"
while emmet is a pop troll he has no idea how to make his own music. as anyone under lord business's rule are not allowed to make their own music
and Watevra is the true queen of the pop trolls. while most pop trolls lived under the rule of lord business she ruled her kingdom far away only returning after his defeat. unfortunately due to miscommunication, this was thought to be an invasion. leading to Watevra's kingdom and the other troll genres to fight. until all of the musical strings were gathered together to finally unite them. emmet and Rex try to prevent this "apopalypse" as they believe Watevra plans to turn everyone into pop trolls. but in reality Rex plans to destroy the strings to get rid of music forever.
going to draw more of this au later! I'm not 100% sure on certain things so i'd love to hear suggestions
Concop lazy doodles (been busy but YeAHhhh i never stop thinking about them)
oh yeah and my missing au idk just badcop having no idea rex is emmet is such a fun angsty idea for me haha. lowkey wanna write this as a ao3 fic (lets just say rex somehow got back into his original timeline after dying lol)