Interviewer: Is Naughty Dog completely finished working on the Crash Bandicoot franchise?
Evan Wells (co-president of Naughty Dog): Yeah, we have to be. Unless we go back to the developers and pay them a lot of money to work on the game that we created, then we're done with Crash Bandicoot, unfortunately. I love the character to death and those games have a special place in my heart, in fact CTR is the one game that I'll continue playing for years to come.
Interviewer: Is it disappointing to see other developers work on Crash Bandicoot?
What Could Have Been: There was meant to be a 2010 game called "Crash: Landed" (which most fans call "Crash Bandicoot 2010"), but it was cancelled after Activision removed the staff at Radical Entertainment who were making the game.
Crash Nitro Kart was originally going to be made by Traveller's Tales and Nina Cortex was made for that game.
Crash Twinsanity had a lot of content cut from it. These include a Doc Amok level that took place on a dry ocean bed, being able to travel to the other two islands from the first game, Coco being a playable character, everything in the 10th dimension, except for Crash, would have been in black and white, there was going to be a good Cortex along with the evil Crash, a level that took place in Coco's mind, a level that took place in Cortex's mind that would have Cortex singing a Villain Song, another Doc Amok level that would have had Crash and Cortex switching personalities and evil Crash putting good Cortex through rehab, a level covering the first Crash game, a race between Cortex and some ants in UF Os, and an appearance from N. Trance, who would have been one of the doctors following Crash and Cortex. The rest of these can be seen here.
Vaporware: An unknown PS2 game, Crash Bandicoot Evolution (eventually transformed into Twinsanity), Crash Clash Racing, a Pikmin - Mega Man type game called Cortex Chaos, a 2010 racing game, the aforementioned Crash: Landed, a tie-in racing game to Landed, and a PC game called Crash Online.