Unlike what most of people think, at times (and only at times) I believe he failed on looking and caring way too much what other people (the industry) was doing when he engaged the prequels. The chosen one thing was taken from Matrix. The Coliseum in AOTC from Gladiator. Qui Gonn came out of someone’s suggestion.
Matrix and TPM where released at the same time so it seems very unlikely.
I just don’t buy for a second that Lucas or Steven Spielberg didn’t have virtual access to any blockbuster script before its release. At some point, any creative environment works as a social web.