They have been eyeing each other for many years now, even watches each other fight live so for sure they have an idea already on the style of each other and no need to watch tapes to prepare for their fight. Or at least not spend so much time about it..
It's true that they haven't been in contact yet but it's clear they know each other's habits without having to look at so many tapes and fights because they know exactly what to do.
This will be very exciting because it is clear that all eyes will be on them with the titles they have and with their big names now it must be quite a wait to see who is the best here.