User blog comment:Weedle McHairybug/Questions for Hideo Kojima./@comment-1672596-20100420100723

This wasn't exactly the point of the blog (it was more questions that needed to be asked to Kojima in regards to plot hiccups), but just to answer your questions.

1. Liquid and Solidus's pasts were technically explored in MGS and MGS2, respectively (Liquid was a SAS member sent off into a Bravo-Two-Zero esque mission to take down Scud Missile Launchers in the Gulf War prior to being captured by the Iraqi forces, and Solidus participated in the First Liberian Civil War as the commander of the Small Boy Unit, the same unit that Raiden was in, as well as murdering his parents, as well as becoming President.). However, Solidus might be referenced in MGSR, and possibly at most get a mission taking place in Raiden's Past, and Liquid was mentioned by Kojima in TGS2009's Peace Walker event to be appearing in Peace Walker, as well as "seeing exactly what drove him to become what he was" implying an exploration of Liquid's past.

2. Well, if they are to be lined up with canon, yes, especially the first Metal Gear. Also, Kojima did hint at a possible remake in an interview.

3. While the R book states it's the case, it's never outright confirmed that he is named as such.

4. Going by the fact that he's already a ghost, I guess he spent some time in the Afterlife getting a well-earned rest, and assuming that Liquid's Arm really did possess Ocelot, possibly also was disappointed with his son for not controlling his abilities.