The Playlist got Boyle on the record to explain his vision for the sequel:
“This has been a long time coming. There’s always been this long term plan for Trainspotting 2, if John [Hodge] can produce a decent enough script, I don’t think there will be any barriers to Ewan [McGregor] or any of the cast coming back. I think they’ll wanna know that the parts are good so they don’t feel like they are letting anyone down.
The reason for doing it again is that people cherish the original, people remember it or have caught up with it if they never saw because they were younger. So you want to make sure you don’t disappoint people. That will be the only criteria I think.”
Most of the cast is currently scattered across television (seriously: see Elementary, Once Upon a Time, Grey’s Anatomy, and Boardwalk Empire), so most of the schedules should align in the summer hiatus. McGregor is the busiest, and may or may not be wary of reuniting with Boyle after he was passed over for the lead role in The Beach.
But McGregor at least seems open to the idea, telling the Daily Record in January, “I would always read [a sequel script] if I was sent it.” That’s promising. I guess one could make a sequel that doesn’t center on Renton, but I don’t see why one would.
Trainspotting Opening Video :