There are some series that ended in midway, I mean unexpectedly in 1/2 season, for example The Tomorrow People. These series failed to explain the whole plot and remain a mystery.
There are also movies such as The Last Airbender. Though there is a chance of part two, I don't think it's coming anymore.
These kinds of series and movies kept a lot of questions/plot unexplained for the next part/season. But there might not be a second season/part. Like in the TV-show Forever they kept the main plot unexplained and as the TV channel cancelled the season 2 those plots are unexplained forever. Similarly there are questions regarding The Last Airbender but part 2 may not happen and questions remain.
Sometimes after the cancellation directors answer the plot in their own way or writers share their thoughts behind to explain those plots. Like in the TV-show Firefly they made a movie to explain it after the cancellation of season 2. But sometimes they're not explained and remain a mystery forever.
Now my question is, there can be answered or unanswered plots for these kinds of series and movies, can questions be asked for opinion on plots for these kinds of series/movies? Will it be on-topic if I ask a question just to know the users' own version due to lack of an official statement? Or may be there is one official explanation that I don't know of?