It's not by chance that Mastodon users can see Threads posts first, before Threads users can see Mastodons posts. They'll probably try to lure people to their platform.
They'll let Threads users see Mastodon (and #Fediverse users) later, but I'm willing to bet that Fediverse posts will never be offered in the algorithm ("For You" tab), and will only be seen in the "Following" tab (that will never be the default). We'll see.
