The Beatles would of probably had a temporary reunion.This is because they would recognize that it would help boost their media presence and their sales.It would of not lasted because they still would of had their previous issues they encountered when they were together.Their reason for unity wasn't strong enough to last.
The Beatles have always had a huge following, and there are people who want them to have a reunion. This would have created a lot of buzz. Ultimately, someone would have done the work to create a scenario for a reunion that everyone involved could have lived with. It would have been a start.
I highly doubt that this would have spurred a real reunion of the band, although it would have been pretty amazing to see them show up unexpectedly. This would have probably been one of the greatest moments in all the history of Saturday Night Live. Imagine the two of them just walking in!
It may have spurred a temporary reunion, but only if all the band members were there. Obviously, it did not happen so the point is mute. If the Beatles were ever to have a reunion, it would have had to be a mutual decision amongst all band members. Sadly, it never came to fruition and now never will.