One can only hope that this series will have good writing and directing. Being the way TV show work, I wouls suspect that Peter Jackson may be involved in a few episodes, and his 'creative license' impact will be minimal. I guess more to the point will be whoever has the reigns of overall production. I read on another site that there may be more to the deal with the
Tolkien Estate where Amazon bought the rights. Up to now, everything produced relating to Lord of the Rings has been based on the original rights deals
J.R.R. Tolkien himself. Despite Christopher Tolkien being against any 'film' rights after his opposition to the Peter Jackson movies, his children Simon, Adam, and Rachael, along with the rest of the board of directors of the Tolkien Estate, convinced him that it would happen eventually and he ceded some rights to more material in exchange for some assurances from Amazon not to do a 'Peter Jackson' with storyline changes. As he released The
Fall of Gondolin, he decided that he would retire as director of the Tolkien estate and let things take its course.