In the next one, a proxy for Peter Molyneux starts using Occulus rift to make people smarter and stronger for games, but also slowly turns them into willing slaves for himself, which he intends to use to over throw the President.
Only Dirk and New Doug (played by Jonah Hill as a former Games Designer for Molyneux) can stop him.
Only this time in act 3 New Doug has to snap Dirk out of being controlled and as Dirk rips off the VR Device and battles the mind control, seeing in his enslavement he killed Tess, all he can do is growl in a manly way: "I didn't ask for this."
Roll credits.
BOOM! Billion bucks and a set audience for the conclusion.
We could also do a none canon spin off where Doug and New Doug have to bumble around to see the new Metal Gear movie before general release, involving a road trip, Seth Rogan, Simon Pegg and Nick Frost.