While most of us continue to be starry-eyed about MGSV: The Phantom Pain [official site], there has been no shortage of Internet Grumbles about its ending, and concerns that it wasn’t finished-finished (possibly related to Kojima and Konami’s latest round of spats?). I’m not going to get into OPINIONS on that stuff myself, primarily because I’m not personally invested in MGS lore, but yeah, there really was an original, longer ending sequence with MORE RIDICULOUS DRAMA and arguably a greater sense of closure, both for Big Boss/Venom Snake himself and in terms of closing the loop between the two main Metal Gear Solid timelines.
This other finale, set on a jungly island, was partially completed before whatever happened happened, and is included on the MGSV bonus disc from the PS4 collector’s edition. You can watch the whole, 18 minute sequence below. Spoilers, inevitably.