Wudu And Shower
If one is doing Ghusl to remove major impurity ( implying that Ghusl was not compulsory for that person at that moment ). Then either one will do proper Ghusl as a substitute for Wuzu ( either by thoroughness and cleanliness and/or by following uswa of the Prophet (sws) for Ghusl ) or one will do wuzu at the end separately . The answer remains the same in these scenarios as well.