Complex sentence: The PW800 was originally going to be a geared turbofan, like its larger sibling the PW1000G, but later announcements revealed that it was going to be a more traditional turbofan engine.
Split into simpler sentences: The PW800 was originally going to be a geared turbofan like the PW1000G. Later announcements revealed that it was going to be a more traditional turbofan engine.