Answer:
Right. Professor Layton and the spectre's call/last specter is set 3 years before the curious village and is set in a mysterious town called Mist Hallery. Basically, there is a mysterious spectre that appears every time the spectre's flute is played and has recently been destroying everything. Layton and Luke first meet in this game and we also have a new character called Emmy Altava who is Layton's first assistant. Flora, Chelmey, Don Paolo and Barton will not be in these next few games but there will be some awesome new characters just the same. There are about 200 puzzles in this new game and it is set to be released on 25th November, (Europe,) and 17th October in America.
If you want to find out more you can visit the Layton wiki.
Hope this helped ^.^
xx