My best guess is that in the end the Nordic countries would have ended as the battle field instead of continental Europe.

The allied would have been forced to prepare Norway and Sweden for an attack, and the USSR, if had invaded Finland, would have been a major threat to Kiruna iron fields, and both the allied and Germany would have been forced to act on this.

The same would have happened if the USSR had invaded the whole of Finland during Winter War. Norway and Sweden would have been invaded by friendly allied troops unless the USSR had continued the attack to Sweden.

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