'Jurassic Park 4' Could Be A Reboot, Says Sam Neill

Of course it is a reboot.  Not sure why this is even an issue.  We all knew it was a reboot.  Not a remake, but a reboot (a film that is simply restarting the franchise, not redoing the events of the first film).
While we wait for the next official announcement, actor Sam Neill - best known for playing Doctor Alan Grant in 1993's Jurassic Park and 2001's Jurassic Park III - told Stuff.co.nz that he will unlikely reprise the role for Jurassic Park 4. He doesn't detail why, but hints at the reason in a brief comment. "I'm told it's a big reboot, a total re-jig."
When enough time passes, any sequel can be considered a reboot.  Hell, look at Texas Chainsaw 3D, Scream 4 and even Superman Returns.  Yes, they're all sequels...and reboots.  Calm down, Sam Neill.

Source: Comic Book Movie