Some events for Norway (I don't know how to trigger them or anything, this is just suggestions).
935:
A son of Harald Fairhair, Håkon, whom has been raised by the English king Athelstan has returned to Norway and claims the throne from Eirik Bloodaxe. Who will you be?
1: Overthrow the tyrant, Håkon the Good will rule our kingdom! (makes Håkon the Good king of Norway, revolt in Bergenshus, AI choice, triggers Eirik Bloodaxe as ruler of Yorkshire, Kingdom of Jorvik independant and at war with Dublin kingdom who controls Lancashire and Northumbria)
2: Lojalty to the rightful ruler. (Eirik Bloodaxe remains king until 961 when Harald Greyfur takes the throne, revolts in Trønderlag, Narvik and Østlandet, Dublin keeps Yorkshire)
BTW: Dublin inheritance for York, Northumberland and Lancashire should be an event for 921 where the AI always choose to inherit.
995:
You are now the rightful ruler of Norway, King Olaf Tryggvasson. You personally converted in England, but will you bring this new faith upon the people? If you choose to enforce this new faith it may cause some unrest, however, relations with Christian nations will improve. If your choice is to personally convert back to paganism and let the people worship the old Gods, stability will be maintained.
1: Enlighten the people with the true faith. (revolts in Trønderlag and Narvik, gain 6 missionaries, stability -3, centralization +1, relations with England +100, relations with Scotland +100, relations with Denmark +50, relations with France +50, relations with Svear -100* relations with Gøtar -100* AI choice)
2: Stay true to the old Gods. (stability +3, relations with Denmark -50, relations with Svear +50*, relations with Gøtar +50*)
3: Stay true to the old Gods and force the filthy Danes to do the same! (stability +1, relations with Denmark -200, gain a casus belli against Denmark for 120 months)
*I believe Sweden was still pagan
1047:
King Magnus has died and you are now the sole ruler King Harald, the Danes however do not favour you and have rose up in rebellion under Svein Estridsson, will you try and quell them or be at peace?
1: Those traitors! I alone shall rule Denmark! (gain national provinces in Skåne, Jylland and Sjælland, at war with Denmark, loose Sjælland and Skåne but keep Jylland, centralization +1, +200 ducats, AI choice)
2: We shall live in harmony (stability +2, relations with Denmark +200, loose Sjælland, Skåne and Jylland, centralization -1)
1064 (Only awailable if Denmark is not annexed or vassalized by Norway):
Peace proposal from Denmark, Svein and Harald issued a peace in 1064 despite the Norwegian victory at Niså in 1062, pherhaps Harald had plans to go westwards...
1: Accept the generous peace. (loose any holdings in Denmark, 300 ducats in indemnities from Denmark, peace with Denmark if war goes on, relations with Denmark +100, -2 Bad Boy points, -10 victory points, loose national provinces on Skåne, Sjælland and Jylland, AI choice if Denmark is not annexed or vassalized by Norway)
2: Ridicolous, we shall continiue to claim our rightfull land! (war continiue with Denmark if still goes on, Sjælland, Skåne and Jylland remains national provinces, +10 victory points)
1066:
A man named Tostig has asked for your support to drive out his brother, Harold of England, in return, you may gain control of England. What is your choice wise lord?
1: Go westerway like our ancestors! (at war with England, gain 10 transports in Sea of Trønderlag, gain 20,000 infantry in Trønderlag, AI choice)
2: Why should we bother? (+2 stability, relations with England +100)
1108 (only awailable if converted to Christianity, something that can be done by a human player at any time, AI will only convert one time, in 995):
Holy war! In 1108, King Sigurd of Norway mounted a crusade towards the Holy Land, on his way he raided in Moorish Spain and helped capturing Lisbon he fought battles with several pirate fleets on his way and visited the King of Sicily before helping King Baldvin of Jerusalem in the siege of Sidon. What is your choice? Will you embark on this great campaign? Masses of people in Norway now wants to go and fight for God, will you hear their call?
1: In the name of God, to war! (stability +2, war with Almohads, war with Baleares, war with whoever Muslim force in the Holy Land, military access through Lyon, Sicily and Jerusalem, relations with England +100, relations with Castille +100, relations with Lyon +100, relations with Papal States +150, relations with Sicily +150, relations with with all Muslim nations -100, +25 victory points. Gain 5 warships, 5 galleys and 5 transports in Sea of Stavanger, gain 12,000 infantry, 5,000 cavalry and 30 siege weapons in Bergenshus. If all these wars gets in-active, -200 victory points, -200 ducats. AI choice, only if converted to Christianity, which will be done unless a human has played as Norway for a few years just to prevent it, AI will not go inactive, sends fleet all the way to Jerusalem and engage war with Muslims.)
2: There is no gains for us in that! (stability -2, relations with Papal States -50, -25 victory points)
I can come up with more if you like, but that's it for now...