just a little theory I and a couple of other fans I've talked to have had since there's this whole big event for next weeks episodes and Todd Boyce apparently Jokingly said at one point that he Hopes the Host of the event would be a good bodyguard for him from angry fans.

and since its also said he's going to leave big repercussions after his exit week maybe he doesn't just off one more person but offs Two?

could be any combination of characters maybe Michael and Sarah? or Tim and Audrey?

as it would leave a Huge impact since none of his victims had ties to anyone else in the street besides Jenny so if Uncle Stephen did in the final week off two actual characters it would leave a bigger impact and legacy.

plus it would bump his kill count up to 5 and make him Corrie's Highest killer and it would forever change the show if he got to off one of his own family like Sarah or Audrey since they've both been close to him during this storyline.