The Eon Ticket can be received via StreetPass from another player who obtained it via StreetPass. As such, it can still be obtained via StreetPass. Since StreetPass data is exchanged with other people met via the PSS, including via the internet, it can also be obtained by connecting to the internet via the PSS, and can currently be obtained this way
According to Bulbapedia, yes, you can get still get the Eon Ticket through StreetPass - although it would be quite hard.
But ,unfortunately,other than that there are no current events.