▁as ▁they ▁track ▁down ▁the ▁remaining ▁members ▁of ▁the ▁Masters ▁of ▁Ev il ▁and ▁end ▁up ▁facing ▁the ▁invas ions ▁of ▁the ▁Sk r ull s ▁in ▁the ▁first ▁half ▁of ▁the ▁season ▁and ▁the ▁K ree ▁in ▁the ▁second ▁half . ▁The ▁Aven gers ▁are ▁una ware ▁that ▁Captain ▁America ▁had ▁been ▁replaced ▁at ▁the ▁end ▁of ▁the ▁first - season ▁finale ▁by ▁a ▁Sk r ull ▁oper ative ▁as ▁part ▁of ▁their ▁system atic ▁in fil tr ation ▁of ▁Earth . ▁This ▁season ▁also ▁all udes ▁to ▁a ▁developing ▁story line ▁that ▁S urt ur , ▁now ▁free ▁of ▁his ▁imprison ment ▁in ▁Mus pel heim , ▁is ▁slowly ▁gather ing ▁his ▁strength ▁to ▁opp ose ▁the ▁Aven gers ▁as ▁a ▁pre l ude ▁to ▁R agn ar ök . ▁M s . ▁Marvel ▁joins ▁the ▁team ▁this ▁season , ▁followed ▁by ▁the ▁V ision . ▁Many ▁other ▁characters ▁from ▁the ▁Marvel ▁Comics ▁universe ▁make ▁appearances , ▁such ▁as ▁Spider - Man , ▁Wol ver ine , ▁Scott ▁Lang ▁( the ▁second ▁Ant - Man ) ▁and ▁his ▁daughter ▁Cass andra , ▁Hero es ▁for ▁H ire , ▁Doctor ▁Do om , ▁Cross fire , ▁Th ad de us ▁E . ▁" Th under bol t " ▁Ross ▁( in ▁both ▁his ▁human ▁form ▁and ▁his ▁" Red ▁H ulk " ▁form ), ▁the ▁Guard ians ▁of ▁the ▁Gal axy ▁( com posed ▁of ▁Star - L ord , ▁Ro cket ▁R acco on , ▁G root , ▁Qu as ar