Kai Leng? That HAS to be a joke. They can't seriously think his perception is anything but a really, really bad joke in ME3 itself, right? He was the very definition of a cliche'd idiot who survived purely on plot armor.
And honestly, I'm not sure I'd be interested even if it was a Garrus game, and I love him. If I'm going to be interested in ME again, I think it'd have to be something completely divorced from the Reapers or Shepard.