Do not hold your breath for anything from the Silmarillon, Unfinished Tales, Children of Hurin, etc. Tolkien only sold the film rights for the Hobbit and LOTR, so unless Christopher has a change of heart in his 90s that he suddenly loves all of the adaptations there have been on his father's work, there is a 0% chance that he will sell the rights for the rest of Tolkien's work. If it's not spoken about in the Hobbit, LOTR, or the appendices it cannot be made into a movie. It's too bad, because while the Silmarillion would never work for a straight adaptation, there are so many amazing stories in there that could each take up a season of a TV show, but it won't be happening.
As for this remake...please no. Apparently if they do purchase the rights, Amazon will not have the rights to all the characters. Now, who that means gets cut isn't known, maybe it is minor characters or maybe Gandalf now has to be Gendorf the Greyish. While not perfect, Jackson's original LOTR trilogy is a pretty damn good adaptation for what it is, I have no such hope that a television remake will do it any sort of justice because A) it is too soon. Ian McKellan is still Gandalf, Viggo Mortensen still Aragorn, etc, and B) one of the largest criticism of Jackson was that he missed the essence of the books and created an action movie instead, and now the Amazon guy wants his own GOT, and wants a gritty, realistic, LOTR...well, that's exactly what LOTR isn't.
The Shadow of War/Mordor games are fun games in their own right, but they are an abomination of Tolkien lore. NOTHING fits into the legendarium of Middle-Earth. If a TV series is going to be made in that sort of vein, steer clear of LOTR please, corrupt some other books, or create your own world.