I reckon he goes back to the UK to fight a live opponent on a Fast Eddie show. That's where the money is. Who will that opponent be? Maybe Chisora if he beats Whyte (could happen) or Michael Hunter or even Usyk. Not easy fights. I think he should stay at home & get more wins.
I think both Hunter & Usyk would have too much. Very tough fights but that's why Fast Eddie pays the big bucks. Parker seems keen to head back over there but he won't be fighting patsies if he goes. His preferred option would be the Dillian Whyte v Dereck Chisora winner but that's going to be everyone's preferred option.
Probably Junior Fa next. They'll hype it up and both fighting on the same card, maybe there is a nice H2h conversation after Parker beats Flores.