The WBC heavyweight world champion is due to be back in the ring before the end of the year but even if it is not going to be a unification showdown with Joshua, the American still expects the pair will fight at some point, Sky Sports reported.
"This fight definitely can be made," he told Premier Boxing Champions.
"I think the fight will be made. Just that this time around when you come to the table, you'll have to come correct. This will be a 50-50 fight. And that's the bottom line."
Wilder insisted he still had not been given a contract with any proposed date or venue on it, despite Joshua's two-fight deal with Wembley Stadium meaning he will be fighting on September 22 and then April 13.
Joshua’s promoter Eddie Hearn has said that 'AJ' will sign a contract for the unification fight with Wilder in April. With the deal based on a flat fee following the American's initial callout, Hearn believes Wilder's "fee should go down" but the 'Bronze Bomber' is far from satisfied.
"We've tried everything… I'm not going to sign a contract that doesn't have a date, that doesn't have a venue," he said.
"Nah, that's one-sided. This contract is straight blind, one-sided.”
Wilder is expected to take on mandatory challenger Dominic Breazeale next, with Joshua expected to do the same with WBA counterpart Alexander Povetkin next.