With major Swedish support and Swedish invasion in Finland/Murmansk I can highly believe Finland and probably Estonia to be given over to Sweden (As both those areas were still considered Swedish and the national historybooks from 1910 still expressed their view clearly how the people there wished to be liberated by the Swedish army).
Sweden had then and still have close connections with Norway. In 1905 and long afterwards the Norwegians themselves pictured the situation as them being a newly freed people of the Danish yoke who finaly had grown up and had to leave the family's house (Sweden) and start a life on their own.
So even if the union was broken the relations between our nations were close.
Norway even offered to share all income from the oilfields (Sweden denied this as we didn't want to be dependent on another nation, dumb socialist gouvernment.

) with Sweden.
Sweden wanted to go to war then and also for the Central powers in 1914, just not the majority who were socialists/communists and considered war to be a way for the capitalists to exploit the workers.
There are still articles in newspapers that can be read of aristocrats who rampage about the Swedish sillyness of not going to war in 1905 and 1914-1915.
We still had a more advanced equipped army (Even if most was imported) by 1914 then most nations. What Swedes though think would make the difference would be the Swedish submarines who would be on the German side.