#1: Include characters and elements from older Rayman installments to the series (1,2 and 3)
#2: make the storyline serious enough that the player actually cares about defeating the bad guy and beating the game.
#3: All of Rayman's powers are given to him though Fariys/Nymphs, it keeps the seance of MAGIC alive(not seen in Rayman 3)
#4: There as to be an equal balance between combat and exportation, or a understandable acceptation.
#5: Have a soundtrack that gives off a TRUE seance of fantasy (pretty much seen in all Rayman games
#6: No stupid jokes/humor. Rayman should be kinda silly, but not full out stupid.
#7: Have the game feature cool, interesting, creative and somewhat serious enemy's (Fuck the Rabbids!!!)
#8: Make the game lovely and attractive like Rayman 2 did.
#9: Make the combat controls comfortable (Damn Rayman 3 curve the bullet shit, and Rayman Origins one hit kill enemy's!!!)
Number 10 is up to you, please leave a comment if you think of anything else, thank you