There’s apparently a trailer, or a teaser, or whatever, for the new Amazon series, but I’ll be damned if I can find it.
The important fact is, Amazon doesn’t get to hose this the way everyone expects they will.
Amazon has a relatively free hand when it comes to adding something, since, as I said, very few details are known about this time span. The Tolkien Estate will insist that the main shape of the Second Age is not altered. Sauron invades Eriador, is forced back by a Númenorean expedition, is returns to Númenor. There he corrupts the Númenoreans and seduces them to break the ban of the Valar. All this, the course of history, must remain the same. But you can add new characters and ask a lot of questions, like: What has Sauron done in the meantime? Where was he after Morgoth was defeated? Theoretically, Amazon can answer these questions by inventing the answers, since Tolkien did not describe it. But it must not contradict anything which Tolkien did say. That’s what Amazon has to watch out for. It must be canonical, it is impossible to change the boundaries which Tolkien has created, it is necessary to remain “tolkienian”.
The Time Span referred to is The Second Age, the period when Aragorn’s ancestors lived on an island in the middle of the ocean called Numenor. It’s also the time when the Rings of Power were forged. So it’s a giant LOTR prequel, really.
But if there’s an army of canon-experts making sure that canon isn’t violated, then I’m suddenly much more comfortable with this.
If only someone at Lucasfilm cared this much.