Promoter Eddie Hearn recently revealed that talks have progressed with Joshua and WBC champ Deontay Wilder as the American continues to call out the Brit star.
He told : "We're all optimistic. [The meeting] was positive and now we move forward. We look at the venues, crunch the numbers and get to the nitty gritty of negotiations, which will be over the next couple of weeks.
"I think there's a willingness from both camps to do it next. We also talked about waiting until summer.
"There are lots of different permutations right now, different venue options as well, talk of one fight in America and one in the UK. But also the understanding that this is a huge fight and one we must get made in 2018."
He said: "I have been waiting on that fight for a long time, me versus AJ, I declare war on you AJ. I have been waiting a long time, I know I am the best. Are you ready for the test?
"I want Joshua, no more ducking, hiding and dodging. Let’s make it happen.
"If Joshua's a strong champion, a true champion, you guys in England should smoke him out, make him fight. You should see if he's the best."