▁doctrine . ▁ ▁The ▁case ▁then ▁returned ▁to ▁the ▁district ▁court . ▁Judge ▁Mot ley ▁dismiss ed ▁the ▁claims ▁on ▁the ▁mer its ▁by ▁grant ing ▁defend ants ' ▁motion ▁for ▁summary ▁judgment . ▁Pla int iffs ▁then ▁appe aled ▁to ▁the ▁Second ▁Circ uit . ▁ ▁Second ▁Circ uit ▁r uling ▁ ▁The ▁court ▁began ▁its ▁analysis ▁by ▁not ing ▁"[ T ] he ▁similarity ▁to ▁be ▁ass essed ▁must ▁concern ▁the ▁expression ▁of ▁ideas , ▁not ▁the ▁ideas ▁themselves ." ▁The ▁court ▁review ed ▁the ▁similar ities ▁and ▁dis similar ities ▁of ▁Super man ▁and ▁The ▁Great est ▁American ▁Hero . ▁It ▁found ▁the ▁two ▁" pro found ly ▁different ": ▁ ▁The ▁pla int iffs ▁sought ▁to ▁( but ▁were ▁not ▁allowed ▁to ) ▁offer ▁expert ▁testim ony ▁that ▁children ▁would ▁be ▁confused ▁because ▁they ▁would ▁not ▁notice ▁the ▁negative ▁language ▁in ▁such ▁phr ases ▁as ▁H ink ley : ▁" may ▁be ▁unable ▁to ▁le ap ▁tall ▁buildings ▁in ▁a ▁single ▁bound ," ▁" may ▁be ▁slower ▁than ▁a ▁speed ing ▁bullet ," ▁and ▁" may ▁be ▁less ▁powerful ▁than ▁a ▁locomot ive ." ▁The ▁court ▁dismiss ed ▁such ▁evidence ▁as ▁imm aterial : ▁ ▁As ▁for ▁the ▁unf air ▁competition ▁claims , ▁so ▁far ▁as ▁they ▁re lied ▁on ▁confusion , ▁the ▁court ▁said , ▁there ▁was ▁no ▁mis re presentation ▁and ▁no ▁lik elihood ▁of ▁confusion ▁as ▁to ▁source . ▁As ▁to ▁" state ▁law ▁claims ▁that ▁rely ▁on ▁the ▁mis app ropri ation ▁branch ▁of ▁unf