Joshua, 34, is on a real hot streak since losing his world titles to Usyk in 2022.
The Watford fighter appears to have got his swagger back, with three stoppages in his past three fights – two of them outright one-punch knockouts.
He is expected to headline at Wembley stadium on 21 September. The frontrunner to face him is domestic rival Dubois, who is also on a comeback trail.
Former world champion and foe Parker is another option for Joshua, considering his recent wins over Zhang and Wilder.
Dubois, however, is an attractive option because the fight could be upgraded to a world-title affair if the IBF choose to strip Usyk.
Joshua appears to be on a collision course with Fury over the next 12 months, regardless of what happens in the Gypsy King’s rematch with Usyk.
Were Joshua to become a three-time world champion in the meantime, or should Fury beat Usyk, it would elevate an already highly-anticipated match-up even more.