Andy was a clever actor and got involved with Peter Jackson and all the Lord of the Rings production. LotR, among other things, got very invested in new ways of creating effects, mostly through the WETA Workshop. This goes back to the Sorbo Hercules series. Motion capture (mocap) was going on, but went into high gear neat the end of Fellowship with the express purpose of creating Gollum properly, as he is a featured character in Two Towers. Outside of New Zealand, James Cameron's company was working towards the same goal for Avatar. Now, following that massive cluster ... ah, ball ... is difficult at best, as technology basically exploded 2003-2006. Now, let's take a little time jump. LotR was huge, as was Avatar and the Potter films. PJ said he didn't want to do more Tolkien, so New Line (or what it became, I'm fuzzy there) hired Guillermo del Toro to write the script and direct two Hobbit films. Humans were involved, so this changed, del Toro sorta left but still had his name on the scripts and some pre-production done, PJ came back, and ever since complained of not enough time or money. Then The Hobbit became three films by studio edict. This just about killed PJ. Andy Serkis had been very involved in all the tech as well as mocap, and became Second Unit Director as well, taking a lot of the burden off PJ. Neither was all that happy with much past "Unexpected Journey", but it got done. Serkis was also doing the Rise of the Planet of the Apes and between and betwixt all this pretty much became the Monarch of Mocap. The dude has skiils! Not to mention being Ulysses Klaw and Snoke!