Though Bryan Singer's X-Men: Days Of Future Past is a triumph, and undoubtedly deserves its title as one of the grandest comic book movies ever made, it is by no means a perfect film. But then, considering the pressures of working within a franchise that has been badly abused by two wayward sequels, and the enormous requirements of bringing two casts together, the fact that the film is a solid four stars is relatively unbelievable. Singer was faced with the task of fixing a timeline that was all but irredeemably broken, and in adding the notoriously ruinous element of time travel to the mix he could well have been accused of asking for trouble. And while the retconning and furious pushing things under the carpet did work to build towards a fitting nostalgic pay-off at the end, there are still a number of plot-holes and unaddressed details that still feel noticeably unanswered. So while the film is very entertaining - and even more so in light of the errors of The Last Stand and X-Men Origins: Wolverine - these questions remain pertinent...