This was my post before the sicc crashed again, saved it though:
I'm sure everyone caught this, but for those who didn't notice, the black and white prologue was of Jimmy's life after the events of Breaking Bad. Saul references this in Breaking Bad season 5. "Months from now best case scenario I'm managing a Cinnabon in Omaha."
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There are a couple other easter eggs in the episode that I read about too:
The key Jimmy placed in Chuck's mailbox was The car remote to the trunk during the final episode of BB
Also, it shows his future Cadillac:
"The show exists in the Breaking Bad universe. It acknowledges the fact that Breaking Bad came first and Gilligan hints at what is yet to come. After losing a hopeless trial as a public defender, Jimmy McGill retreats to his beat up rust yellow Suzuki Esteem, parked in the shadow of a white Cadillac DeVille, the kind that Saul Goodman will one day “LWYRUP” in."