Does the Battle of the North Cape still take place in 1943?
Short answerProbably not, because the likely survivor remains in harbor as a Tirpitz-like threat in being instead of making Scharnhorst's sortie.
NotesThe outcome depends on whether Germany is willing to sortie its remaining heavy ship. The survivor is likely to become a Tirpitz-like threat in being from 1941 onward. A ship kept in harbor cannot reproduce Scharnhorst's interception and destruction off the North Cape in 1943. The historical battle is therefore unlikely unless German command policy changes enough to risk the survivor actively.