Solid Snake's moveset is quite a hard one to imagine and is quite questionable... I wonder:
~ Looking at the 2nd video,, what would happen if you launch the rockets at the edge of a platform, would the rockets explode at ground/platform level or will the rockets shoots further downward??? If it does shoot further down, we'll have ourselves one of the strongest edgeguard character... Then again, would make sense if he is the strongest edgeguarder due to MGS reference of leveling up your hanging skills by doing random pull-ups...
~ No guns??? How about a laser guns made by everybody's favorite otaku, Otacon???
~ Solid Snake and Naked Snake/Big Boss are two different people... Solid Snake doesn't known any CQC moves, so is there a possibility Solid Snake some how picked it up just for Smash???
Also, with much boredom, I present to you:
Tsu's Version of Snakes Moveset
A Button
A - Punch/kick combos
UTilt - Kick lift (video)
Sidetilt - Roundhouse (Chuck Norris reference)
Dtilt - Rocket (video)
USmash - Uppercut (Mario reference of Utilt)
SideSmash - Knee to Double Arm Knockdown (video)
DSmash - Side kicks (C.Falcon reference)
Nair - Sex Kick (Do I really need to explain)
Uair - Kick knockup (similar to C.Falcon's dair, except upwards)
Fair - Flying Axe Kick (video)
Bair - Backwards Kick (Jigglypuff reference)
Dair - Downwards kick (Page 13 of this topic)
Dash - Tackle roll (video)
Grabs
Grab - CQC grab (MGS3)
A - Knee or choke (Choking seems a bit to mature)
Up - Palm lift (C.Falcon reference)
Down - Leg Trip (MGS3)
Forward - Arm Overturn (MGS3)
Back - Over Shoulder Throw (Street Fighter Ryu reference)
B Button
B - Laser gun/Grenades
Up B - Over exaggerated grenade toss (jumps forward to toss a grenade)
Down B - Claymore/TNT placement
Side B - Rockets
Misc.
Guard - The Famous "Box of Peace"
Kirby Hat - Snake's Bandanna
Taunt 1 - Intercom conversation
Taunt 2 - MGS3 "Ape Escape" minigame victory pose
Taunt 3 - Smoking a cigar
Do nothing - Chin rub
Blah... Not quite creative, but oh well...