Over the next fortnight, David locks horns with grandma Audrey (Sue Nicholls), who attempts to reclaim the hairdressing salon in order to raise funds for a cruise with former conman Lewis Archer (Nigel Havers).
Speaking to What's on TV, the actor revealed that he is keen for David's darker side to "continue for a while".
When asked whether he is looking forward to David's war with Audrey, Shepherd responded: "Yeah, I am! I think it's been a long time coming.
"I'm always getting asked when David's going to be nasty again."
Meanwhile, the 24-year-old added that David would go as far as to "sue" Audrey should she take back the salon.
Shepherd earlier this week told Digital Spy that David's "evil stare" will make a comeback. The soap villain has recently been involved in a string of romantic plots.
> Coronation Street Jack P Shepherd: 'I'll defend David over salon war'