Seems like Palpatine was behind it all. And, no, the title doesn’t necessarily mean Luke will return from the dead like Jesus; I believe the ‘rise’ of Skywalker might very well be Rey ..
One of Luke's lines from the trailer - "No one is ever really gone". The screen then cuts to black and we get a tease for Palpatine. And the title is "Rise of Skywalker". Maybe this also means that Luke is "not gone" either … but I’m betting, absed on what Mark Hammil has stated, that, if Luke does Show up, it’ll be in a minimal role.
With all of that said, Hayden Christensen surely has to be involved in this movie, right?