Deontay Wilder says the "big fight" he wants is against Anthony Joshua, but his principal aim is to unify the heavyweight division by "all means necessary".
Three of the four world heavyweight belts will be on the line when IBF and WBA 'Super' holder Joshua takes on WBO champion Joseph Parker at the Principality Stadium, on March 31, live on Sky Sports Box Office.
Wilder will be ringside in Cardiff as part of the punditry team if he beats Luis Ortiz on March 4, live on Sky Sports, and has been keen on fighting Joshua for years.
"The big fight is me and Joshua, of course, and that's who I want," said Wilder. "I've been calling him out for almost two years now. A lot of people think this just started, but it didn't, it started years ago.
"I told people to do their research and their history, then they'll come up with the facts instead of the fiction. But, I want to unify by all means necessary, whether [Joseph] Parker has it or Anthony [Joshua] has it.
"It doesn't matter who has it, I want to unify and I can't be clearer than that."
Wilder will defend his WBC world heavyweight title belt for a seventh time against Ortiz at the Barclays Centre, New York, and he has issued a warning to the Cuban ahead of their bout.
"Luis Ortiz you about to go down," he added. "I'm going to use you as an example for the rest of them.
"People say you got skill, people say you got will, they say you King Kong, the boogeyman as well. All of these things they relay you as, but the Bronze Bomber is going to beat your a**."
Watch the Anthony Joshua vs Joseph Parker world heavyweight title unification fight, from Principality Stadium, Cardiff, on March 31, live and exclusive on Sky Sports Box Office.