plan et , ▁the ▁two ▁remained ▁tra pped ▁there ▁for ▁months ▁there after , ▁until ▁res cu ed ▁by ▁their ▁returned ▁team m ates . ▁ ▁X S ▁and ▁her ▁version ▁of ▁the ▁Leg ion ▁were ▁removed ▁from ▁main stream ▁DC ▁continu ity ▁in ▁the ▁Te en ▁Tit ans / Leg ion ▁Special . ▁They ▁were ▁revealed ▁to ▁be ▁alive ▁on ▁in ▁the ▁parallel ▁universe ▁containing ▁" E arth - 2 4 7 ". ▁ ▁The ▁Final ▁Cris is : ▁Leg ion ▁of ▁ 3 ▁World s ▁min is eries ▁reve als ▁that ▁the ▁T orn ado ▁Tw ins ▁and ▁their ▁family ▁members ▁( including ▁X S ) ▁origin ated ▁on ▁the ▁same ▁Earth ▁as ▁the ▁post - In finite ▁Cris is ▁version ▁of ▁the ▁Leg ion ▁( which ▁was ▁introduced ▁in ▁" The ▁Light ning ▁S aga "). ▁Thus , ▁continu ity ▁revis ions ▁have ▁been ▁made : ▁after ▁Barry ▁Allen ' s ▁death ▁in ▁Cris is ▁on ▁In finite ▁Earth s , ▁the ▁Tw ins ▁and ▁their ▁families ▁became ▁the ▁target ▁of ▁Professor ▁Zo om , ▁who ▁was ▁attempting ▁to ▁sab ot age ▁Don ▁Allen ▁and ▁Mel oni ▁Th aw ne ' s ▁marriage . ▁Both ▁families ▁escaped ▁to ▁Earth - 2 4 7 ▁and ▁the ▁Tw ins ▁died ▁soon ▁after ▁in ▁unknown ▁circumstances . ▁Both ▁c ous ins ▁were ▁reun ited ▁with ▁their ▁grand m other ▁I ris , ▁and ▁both ▁also ▁rapidly ▁aged ▁to ▁te en agers ▁within ▁days . ▁Pres umably , ▁X S ' ▁rapid - aging