We knew this wasn't over, too many roles that still needed to play out.
This feels like it will be the final part however, perhaps he will morph but I don't think there will be any more twists from that aspect.
Tanaka has to come soon as well to give us the truth being her likely connection to Pandora and to defeat the Ainsworth.
I also don't think it's really dragged out, it's just the length between releases that have been making it feel tough.