Wonderful update CanKiwi from one of my favourite TL's, are you able to give us an idea of when TTL's continuation war will commence?
Furthermore has the Finnish Air Force resumed their rearmament ITTL and what is their main fighter and bomber?
In TTL, the Soviet Union does not attack Finland at the time of the German attack on the Soviet Union in the Summer of 1941. Finland partially mobilizes but remains neutral. With Stalin dead, the triumvirate ruling the USSR sees no value in attacking Finland and other than maintaining defences along the new borders with Finland, does not launch any attacks on Finland. Neither do the Finns permit any German forces to enter Finland or the Finnish-held zone of northern Norway.
There is thus no Continuation War. What does happen is Finland maintains very close ties with the Polish government-in-exile, and maintains close contact with the Polish Home Army, as well as with nationalist movements in Lithuania, Estonia and Latvia. The Finnish discover of the Soviet death camps on the Kola Peninsula and along the White Sea Canal was heavily publicised at the time of the Winter War, with much the same fervor as the discovery of the Nazi death camps was publicized by the Allies at the end of WW2.
Thus there is no avuncular "Uncle Joe" and not as much pro-Soviet propaganda in Allied countries after Germany attacks the Soviets. For practical reasons, Allied military support for the USSR takes place more or less as per history, and the German offensive and Soviet defence take place more or less as per history. In early 1943, Finnish representatives led the investigation of the Katyn Massacre. On top of earlier Finnish discoveries on the Kola and the White Sea, this investigation hardened Finnish views on the Soviet Union and led to a decision that Finland must do something concrete to assist the Baltic States and Poland as the course of the war changed against the Germans.
Negotiations with the US and Britain as well as with the Polish government-in-exile began in secret and shipments of lend-lease weapons (and polish soldiers) began in the spring of 1943.
In Spring of 1944, anticipating the Soviet summer offensive of that year by some two months, Finland launched the invasion and seizure of Estonia, re-entering WW2...... for Finland, the War of Revenge had begun...... (can't remember if that was what I planned to call it, there was a discussion on this a couple of years ago....)
At this stage, the main Finnish fighter is a new one.... it comes into service shortly prior to the Winter War..... working on that post slowly at the moment....