Board Thread:General Discussion/@comment-6431205-20130423195835/@comment-2.27.149.45-20131225182428

I suppose you could work that in with the rescuing Sunny thing. Perhaps you have a bad guy who's trying to get, say, some data on the old Patriot AIs stored in Sunny's head as part of some grand, silly plan involving Metals Gears and nanomachines, perhaps mind-controlling cyborgs using a variant of The System. That way you could have plot-relevant flashback missions with Raiden rescuing Sunny and interacting with the new villain to build their backstory.

The big thing would be trying to tie the backstory to the current story rather than just making a prequel to MGS4 that doesn't really complement it in tone. It's not like rescuing Sunny alone is going to be very exciting since we already know he succeeds.