If Ubisoft want to make Rayman 4 a great game, they should add in some explanation to his past and what happened to characters in between games.
For example, Moskito was in Rayman 1 & 2, but not in 3. However, Globox was in 2, 3, and M.
The only character who has been in all of the games in Rayman. So, I think some explanation is needed (and using old bosses will add that extra touch to the game)
Who here misses the old characters? I really miss Mr. Sax and Moskito. I don't miss Moskito as much because he was in R2, but he's still a cool character.