6) Tron
The original Tron looks dated as hell now, but back in the day, the special effects used to bring the Grid to life were the most cutting edge out there. Despite not being a hit upon its initial release, Tron eventually gained a cult following that ultimately led to a sequel titled Tron: Legacy.
Unfortunately, the legacy is set to continue as Disney have recently announced that Garrett Hedlund and Olivia Wilde are returning for another sequel that follows on from the events of the previous movie. While these films look undeniably great, the Tron franchise is thin on the ground plot-wise, making a continuation of the story pointless at best.