. ▁He ▁uses ▁his ▁own ▁sister ▁as ▁a ▁test ▁subject ▁in ▁creating ▁the ▁Ne o - V ip ers , ▁making ▁her ▁an ▁agent ▁known ▁as ▁the ▁Baron ess . ▁He ▁car ries ▁a ▁deep ▁grud ge ▁against ▁Duke ▁for ▁leaving ▁him ▁to ▁die . ▁When ▁Duke ▁is ▁captured , ▁R ex ▁reve als ▁himself , ▁as ▁he ▁attempts ▁to ▁subject ▁Duke ▁to ▁the ▁nan om ites ▁and ▁make ▁him ▁one ▁of ▁his ▁Ne o - V i per ▁soldiers . ▁But ▁the ▁Baron ess ▁over comes ▁her ▁programming ▁and ▁saves ▁Duke , ▁while ▁R ex ▁esc apes ▁with ▁a ▁badly ▁burn ed ▁McC ull en . ▁R ex ▁uses ▁spe cially ▁made ▁nan om ites ▁to ▁he al ▁McC ull en ' s ▁face , ▁which ▁also ▁enc ases ▁it ▁in ▁a ▁living , ▁silver - like ▁metal . ▁Dub bing ▁him ▁" Dest ro ", ▁R ex ▁puts ▁on ▁a ▁new ▁breath ing ▁mask ▁and ▁tells ▁McC ull en ▁to ▁call ▁him ▁Commander . ▁Although ▁he ▁is ▁arrested ▁and ▁placed ▁in ▁a ▁high ▁security ▁prison ▁ab o ard ▁the ▁USS ▁Fl agg , ▁Cob ra ▁Commander ' s ▁master ▁plan ▁had ▁only ▁begun , ▁with ▁Z art an ▁dis gu ised ▁as ▁the ▁President ▁of ▁the ▁United ▁States . ▁ ▁Cob ra ▁Commander ▁returns ▁in ▁G . I . ▁Joe : ▁Ret ali ation , ▁played ▁by ▁Australian ▁actor ▁Luke ▁Bra ce y ▁and ▁vo iced ▁by ▁Robert ▁Baker . ▁Director ▁Jon ▁Ch u ▁suggested ▁in ▁a ▁March ▁ 2 0