This report comes from the fansite TheOneRing.net, which says that he and his production crew in New Zealand are currently trying to decide whether or not to take the offer or sign up for Amazon’s upcoming Lord of the Rings TV series, which will be a prequel based on other works by British writer J.R.R. Tolkien.
It makes since that the TV series would want to hire Jackson, whose work made the Lord of the Rings Trilogy one of the most successful movie franchises of all time. The Hobbit series is less beloved (including by Jackson himself), but nevertheless proved a big moneymaker for New Line Cinema, which, like the DCEU, is owned by Warner Bros.
Which project he will choose, if he is indeed debating them, remains to be seen. Given how much time he has spent developing the cinematic version of Middle-earth, it would make sense that he would be invested in how this new adaptation develops; on the other hand, there is the sense that he is sort of burnt out with the franchise (again, his work on The Hobbit comes to mind), so maybe he would like to try something new.
If he really is intending to do something for the DCEU, it is unknown whether he will work as a director, writer or producer. It is also unknown what project he would pick. The upcoming New Gods movie, to be directed by Ava DuVernay, has a similar tone to the fantasy epic that made him famous; on the other hand, he also likes historical movies, which bring to mind Wonder Woman or the recent-announced Stephen Spielberg Blackhawk. Really, it could be just about anything.
The DCEU has not been very successful so far, and Warner Bros. has been working recently to try to put things on track. To that end, many executive positions have changed and new directors have joined the franchise. Given Jackson’s success, he would no doubt be seen as a boon to the troubled series. Whatever project he might pick, his contributions would no doubt result in an interesting final product.