Ubisoft is lazy. They always think about the past and the present, never about the future.
Think about this: When Rayman 1 became a success, they decided to not make sequel, but instead make spin-offs.
Learning with Rayman, Rayman Forever, Rayman Gold, Rayman Activity Centre.
After years, Ubisoft makes Rayman 2. The game becomes a huge success like Rayman 1. The following happens: spin-offs.
Rayman 2 for PS2, Rayman Revolution, Rayman M.
2000: Ubisoft creates a GBC remake for Rayman 1.
2001: Ubisoft creates a GBC remake for Rayman 2.
Rayman Advance is released. A remake of R1.
Ubi creates Rayman 3, with much less help from Michel Ancel. The game is quite different from the first two games.
Rayman 3 gets a GBA game, and it is almost identical to Rayman 2.
Rayman 10th anniversary is created. A collection of old Rayman games.
A new Rayman game is made for the GBA: Rayman Hoodlums' Revenge. The is very much identical to Rayman 3 and somewhat similar to Rayman 3 (GBA)
Over the years, Ubisoft creates remakes for Rayman 1 & 2.
2006: Ubisoft cancelled an amazing project and turns it into a party game: Rayman Raving Rabbids.
Rayman Raving Rabbids recieves a GBA game. It is very similar to Rayman 3 (GBA) and uses sound effects from different Rayman games.
Ubisoft makes Rayman Raving Rabbids DS. It has old sound effects, bad quality, and bad music. The game is small.
Ubisoft makes more party games similar to RRR: Rayman Raving Rabbids 2 and Rayman Raving rabbids TV Party.
RRR DS games are made, ans they are terrible.
Rayman is removed from the series.
Ubisofts starts making remakes from Rayman 1 & 2 for several years.
2011: Ubisoft decided to make a NEW GAME.
Do you see the pattern? Ubisoft is lazy.