And just to mention it now, I don't think there's any way the Nazi invasion could cause the Soviet government to collapse, but simply draw so much Soviet blood that they can't make major inroads into Europe.
As I said, Fort Eben Emael doesn't fall to the German glider troops, but suffers enough damage that the Germans are able to reduce it within a few more days, but this gives the allies in France a few more days to prepare, to the point that they are able to hold the Germans off longer, and in retaliation, Hitler simply occupies the country rather than allowing a rump government as per OTL. However, this drives the French colonies firmly into the allied camp, and allows the allies to quickly close the North African front with a drive from Tunisia. If they can clean up the Castle Bromwich issue earlier, then combined with the slower German advance in France, the inability of the Luftwaffe to beat the RAF is never really in doubt, meaning that the Germans never really start terror-bombing the British who likewise focus on more strategic targets.
With the loss in rapid succession of both their East African and North African forces, and the defeat of their Baltic forces, the Italians decide to play it safe and back Germany in Russia, in exchange for German support later in reclaiming North Africa.
Due to not having to maintain forces in North Africa, the Axis does better in Barbarossa, taking Leningrad in late October, 1941, and also Kandalaksha, effectively preventing most of the supplies debarked in Murmansk from reaching the Soviet forces in the south (aircraft arrive though, flown from Murmansk to Archangelsk). The Germans follow this up in 1942 with a pair of unsuccessful but draining attacks on Murmansk and Archangelsk, which draws off Soviet forces, allowing Axis forces in the Caucasus to eventually capture Stalingrad, and later withdraw successfully from the Soviet counter-attack.
In the Far East, the Japanese at first make reasonable gains, but soon run into opposition in Malaya and Burma, turning these fronts into bloody slugging-matches that draw in Japanese forces from elsewhere.
Not sure how realistic any of this is.