▁super h ero es ▁in ▁general ▁decl ined . ▁The ▁Green ▁Lan tern ▁com ic ▁book ▁was ▁cancel led ▁with ▁issue ▁# 3 8 ▁( May – J une ▁ 1 9 4 9 ), ▁and ▁All ▁Star ▁Comics ▁# 5 7 ▁( 1 9 5 1 ) ▁was ▁the ▁character ' s ▁last ▁Golden ▁Age ▁appearance . ▁When ▁super h ero es ▁came ▁back ▁in ▁fashion ▁in ▁later ▁dec ades , ▁the ▁character ▁Alan ▁Scott ▁was ▁rev ived , ▁but ▁he ▁was ▁forever ▁marg inal ized ▁by ▁the ▁new ▁Hal ▁Jordan ▁character ▁who ▁had ▁been ▁created ▁to ▁supp lant ▁him ▁( see ▁below ). ▁ ▁Initial ly , ▁he ▁made ▁guest ▁appearances ▁in ▁other ▁super h ero es ' ▁books , ▁but ▁eventually ▁got ▁regular ▁roles ▁in ▁books ▁featuring ▁the ▁Justice ▁Society . ▁He ▁never ▁got ▁another ▁solo ▁series . ▁Between ▁ 1 9 9 5 ▁and ▁ 2 0 0 3 , ▁DC ▁Comics ▁changed ▁Alan ▁Scott ' s ▁super h ero ▁cod ename ▁to ▁" S entin el " ▁in ▁order ▁to ▁distinguish ▁him ▁from ▁the ▁newer ▁and ▁more ▁popular ▁science ▁fiction ▁Green ▁Lan tern s . ▁ ▁In ▁ 2 0 1 1 , ▁the ▁Alan ▁Scott ▁character ▁was ▁rev amp ed . ▁His ▁cost ume ▁was ▁red es igned ▁and ▁the ▁source ▁of ▁his ▁powers ▁was ▁changed ▁to ▁that ▁of ▁the ▁myst ical ▁power ▁of ▁nature ▁( re ferred ▁to ▁in ▁the ▁stories ▁as ▁" the ▁Green "). ▁ ▁Silver ▁Age ▁In ▁ 1 9 5 9 ,