So, i was thinking...
If the Stormcloaks would drive out the Empire, and the Thalmor would invade Skyrim as a response, would there actually be a problem?
I mean, we all know about Ysgramor and the five hundred companions who drove out the Snow Elves and conquered all of Skyrim.
The Nords are brave warriors who are well known with the bad weather and have been living in Skyrim all their lives. (After Atmora of course)
So if the Thalmor invaded Skyrim, wouldn't the Nords just kick their asses and expand their territory? (maybe even into Cyrodiil)
The Thalmor know little of Skyrim, and are not familiar with the weather, terrain.
The Nords are also probably better in fighting.
So what happened to those strong and brave Nords?
For some reason everyone is afraid that they could actually lose Skyrim. I think that the Nords could easy defend themselves from an invasion.
I also would like to point out that the Thalmor would probably use light armor (Elven armor) while the Nords would use heavy armor (steel n' stuff).