There's no such thing as domestic marquee anymore, a team can have two marquees (which can be international or not) and a guest player who can play 14 games, there used to also be a full season guest player (or the Tim Cahill rule) which allowed a guest player to play the full season but that finished when Cahill left.
I kind of think the A-League should rebrand the marquee players as designated players (a la MLS) as the wording creates confusion, a marquee is just a very expensive player who's outside of the cap.
Although, what we appear to be chasing is a true marquee, i.e. someone who's eligible for FFA marquee funds.