We already have cable grenades (napalm toss), captain commando assist (pillar), sentinel flight (painwheel), juggernaut's huge punch (titan knuckle) and probably more stuff to add on the list cuz I didn't really play MvC2.
		
		
	 
Oh dang, you noticed.  :^P
Cable s.Fierce -> Peacock s.HP
Grenade -> Tear Toss
AHVB x3 -> Argus x3
Psyblade assist -> Updo
Captain Corridor assist -> Napalm Pillar
Flight -> Painwheel
Scimitar -> Squigly DP
Juggernaut Punch -> Brass Knuckles
BH Inferno ("pillar") assist -> Shadow of Impending Doom
HSF -> Motor Brigade
Oroboros -> Cat Heads
Rocks assist -> Twirl
Headcrush -> SSJ
Berserker Barrage -> Cat Scratch Fever
Hyper Schw' -> Eliza's Lv3 (closest we're getting)
and double snaps, obviously.
Some of the less obvious ones...
Berserker Claw -> Savage Bypass
Summers Family Roundhouse -> Cerebella j.HK (her honorary last name is Summers, heheheheh.  Nobody ever asked what it was.)
IM infinite -> Val's B&B  ;^)
Hailstorm -> Silent Scope
Still missing drones, drill, rocket punch, superman grab, and Dancing Swords (hahahaha probably not that one).
Titan Knuckle is Potemkin 6H, though.